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Search: Posts Made By: Batalov
Forum: Information & Answers 2021-09-24, 17:56
Replies: 54
Views: 6,901
Posted By Batalov
I ran some prep work, because that phrase...

I ran some prep work, because that phrase bothered me too.

So - both in game and/or betting world and/or medical genetics field, and in statistics that underlies all them, there is quantification...
Forum: And now for something completely different 2021-09-24, 17:33
Replies: 20
Views: 7,299
Posted By Batalov
Yes. I was too excited to speak in full...

Yes. I was too excited to speak in full sentences. :batalov:
Forum: Information & Answers 2021-09-24, 09:22
Replies: 54
Views: 6,901
Posted By Batalov
Indeed you are confused. A Russian (collective...

Indeed you are confused.
A Russian (collective pseudonymous) philosopher Prutkov's aphorism goes: "If you see a 'buffalo' sign on an elephant's cage, do not trust your eyes."

It was surely not...
Forum: Information & Answers 2021-09-24, 08:13
Replies: 54
Views: 6,901
Posted By Batalov
Ok,let's count this for half of the first step....

Ok,let's count this for half of the first step. You established the prior.I will even grant you that there are no expected factors below 2^212 (which is 1/6th of the size)
Now what?
So far, what...
Forum: Information & Answers 2021-09-24, 07:00
Replies: 54
Views: 6,901
Posted By Batalov
Thumbs down Can you show anything other than "because I think...

Can you show anything other than "because I think so" for that belief?
While factoring numbers of even lesser size we have routinely obtained three- and even four-way...
Forum: And now for something completely different 2021-09-24, 06:43
Replies: 20
Views: 7,299
Posted By Batalov
Shoot! That didn't last long... 884748...

Shoot! That didn't last long...
884748 (https://primes.utm.edu/primes/page.php?id=132743) digits is now the new top. :rolleyes:
Forum: And now for something completely different 2021-09-23, 22:14
Replies: 20
Views: 7,299
Posted By Batalov
Lightbulb New record AP-3 with a 807,954-digit max element:...

New record AP-3 with a 807,954-digit max element:
6325241166627*2^1290000-1+d*(1455*2^2683953-6325241166627*2^1290000), d=0 (https://primes.utm.edu/primes/page.php?id=132739),1...
Forum: And now for something completely different 2021-09-23, 00:29
Replies: 13
Views: 360
Posted By Batalov
That is funny (if it was supposed to be a joke) -...

That is funny (if it was supposed to be a joke) - but incorrect.
9-digit palindrome primes exist and there are tons of them. For example, 100030001.
1234567...
Forum: And now for something completely different 2021-09-22, 09:15
Replies: 4
Views: 459
Posted By Batalov
Arrow Makoto Kamada would be interested to extend his...

Makoto Kamada would be interested to extend his collection. https://stdkmd.net/nrr/1/10007.htm
Send those findings to him... and to OEIS: https://oeis.org/A088274
Forum: Dobri 2021-09-21, 23:15
Replies: 50
Views: 1,533
Posted By Batalov
Well, isn't it fun racing the race that already...

Well, isn't it fun racing the race that already finished in 1976 (https://www.ams.org/journals/mcom/1978-32-142/S0025-5718-1978-0476616-X/S0025-5718-1978-0476616-X.pdf) and reporting results as if...
Forum: And now for something completely different 2021-09-21, 19:53
Replies: 13
Views: 360
Posted By Batalov
Credit (and SIM-) card numbers have the similar...

Credit (and SIM-) card numbers have the similar (not the same (https://en.wikipedia.org/wiki/Luhn_algorithm)) protection from typos and transpositions.
Forum: And now for something completely different 2021-09-21, 19:31
Replies: 13
Views: 360
Posted By Batalov
Lightbulb I've actually been asked, so I could repost here...

I've actually been asked, so I could repost here exactly why every "even-length" palindrome is divisible by "11" (think decimal, but it is true for any base b).
We could simply say that order of...
Forum: Aliquot Sequences 2021-09-21, 19:02
Replies: 3,115
Views: 249,816
Posted By Batalov
Yeah, there are a few threads over years to the...

Yeah, there are a few threads over years to the same effect. It is.

For smaller numbers/projects, it is very difficult to hit the exact cusp, so the usual rule of thumb for automatic scripts is...
Forum: Riesel Prime Search 2021-09-21, 01:30
Replies: 273
Views: 47,284
Posted By Batalov
Thumbs up Good! Excellent! Even Kamada-san wrote to him...

Good! Excellent!
Even Kamada-san wrote to him and cc:'d me (as if I could help :rolleyes: ).

But it is fixed now, cool beans.
Forum: Lounge 2021-09-21, 01:27
Replies: 1,699
Views: 134,746
Posted By Batalov
knptjRo83Ec La Palma volcano eruption continues...

knptjRo83Ec
La Palma volcano eruption continues on Canary Island | LIVE
1,397 watching now
Started streaming 5 hours ago



@xilman - I hope the wind blows the other way for you?
Forum: Aliquot Sequences 2021-09-21, 01:08
Replies: 3,115
Views: 249,816
Posted By Batalov
That's the famous cusp (of convergence)

That's the famous cusp (of convergence)
Forum: Wagstaff PRP Search 2021-09-20, 19:33
Replies: 5
Views: 5,397
Posted By Batalov
Use (a-b)(a+b) = a2 - b2 and Bob's your uncle.

Use (a-b)(a+b) = a2 - b2
and Bob's your uncle.
Forum: And now for something completely different 2021-09-17, 17:49
Replies: 13
Views: 360
Posted By Batalov
...but 10^(n)-epsilon has n digits And of...

...but 10^(n)-epsilon has n digits

And of course, the only palindrome prime that has an even number of digits (in any base, actually) is "11"! (And even "11" can be composite; then none.)
All...
Forum: NFS@Home 2021-09-16, 16:33
Replies: 33
Views: 3,761
Posted By Batalov
8p3_930M is done

Thu Sep 16 01:02:09 2021
p88 factor: 8140818645611617140423189084010180374627188803000899172278298237756498599357784319269741
p100 factor:...
Forum: Riesel Prime Search 2021-09-15, 21:52
Replies: 273
Views: 47,284
Posted By Batalov
Cool When I was already way into sieving, I thought...

When I was already way into sieving, I thought that I should have picked 1234321 decimal digits length :rolleyes:

But it turned out good. With 1234567 digits' dataset the hit came, statistically...
Forum: Riesel Prime Search 2021-09-15, 16:06
Replies: 273
Views: 47,284
Posted By Batalov
Prof.Caldwell's calculator had insufficient...

Prof.Caldwell's calculator had insufficient precision. I'll drop him a note. It is, of course, 1234567.

All palindromes of even length (except 11) are composite! :rolleyes:
Hint: they are...
Forum: No Prime Left Behind 2021-09-15, 00:06
Replies: 1,518
Views: 210,809
Posted By Batalov
That was lucky! In a couple days it wouldn't...

That was lucky!
In a couple days it wouldn't have fit. Now it will stay there forever
:beer2:
Forum: Riesel Prime Search 2021-09-14, 20:08
Replies: 273
Views: 47,284
Posted By Batalov
Another Riesel "other" number is coming soon. ...

Another Riesel "other" number is coming soon.

It is a palindrome, chock full of "9"s (with a few others) and is neatly 1,234,567 decimal digits long
Forum: Lounge 2021-09-14, 19:58
Replies: 1,779
RIP
Views: 179,901
Posted By Batalov
Norman Macdonald, a Canadian stand-up comedian...

Norman Macdonald, a Canadian stand-up comedian (https://en.wikipedia.org/wiki/Norm_Macdonald)
Forum: NFS@Home 2021-09-14, 05:58
Replies: 33
Views: 3,761
Posted By Batalov
Plus Fib(1409) is done Mon Sep 13 21:49:33 2021 ...

Fib(1409) is done

Mon Sep 13 21:49:33 2021
p64 factor: 1645314853783969974409864778570205738354678434910357950092999577
p161 cofactor: 1263615066...54657241

edS1VXSa
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