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Forum: And now for something completely different 2020-04-25, 09:09
Replies: 48
Views: 28,142
Posted By paulunderwood
Congrats, Serge, for the new sexy triplet (and...

Congrats, Serge, for the new sexy triplet (and CPAP) record (10,753 digits):

https://primes.utm.edu/primes/page.php?id=130856

I trust you will update the wiki page...
Forum: And now for something completely different 2020-01-28, 17:11
Replies: 48
Views: 28,142
Posted By paulunderwood
I have edited the Wiki page...

I have edited the Wiki page (https://en.wikipedia.org/wiki/Sexy_prime). Peter's recent "record" no longer shows.
Forum: And now for something completely different 2020-01-23, 08:47
Replies: 48
Views: 28,142
Posted By paulunderwood
Congratulations. I have updated the Wiki page.

Congratulations. I have updated the Wiki page.
Forum: And now for something completely different 2019-10-13, 19:20
Replies: 48
Views: 28,142
Posted By paulunderwood
Forum: And now for something completely different 2019-10-12, 16:25
Replies: 48
Views: 28,142
Posted By paulunderwood
Norman Luhn:

Norman Luhn:
Forum: And now for something completely different 2019-10-04, 10:20
Replies: 48
Views: 28,142
Posted By paulunderwood
record quadruplet

Ken Davis:

1901870849*(269504*1601#*(269504*1601#+1)*(269504*1601#-1)/385)+6*(269504*1601#-1)-5

is a is a 2053 digit sexy prime quadruplet for n=0-3

-5 proof courtesy of Primo

+1,+7,+11...
Forum: And now for something completely different 2019-10-03, 15:37
Replies: 48
Views: 28,142
Posted By paulunderwood
Done :smile:

Done :smile:
Forum: And now for something completely different 2019-10-02, 21:18
Replies: 48
Views: 28,142
Posted By paulunderwood
https://en.wikipedia.org/wiki/Sexy_prime needs...

https://en.wikipedia.org/wiki/Sexy_prime needs updating with Peter's new pair.
Forum: And now for something completely different 2019-10-01, 09:02
Replies: 48
Views: 28,142
Posted By paulunderwood
New big triplet

Ken Davis further improved the record with a 6,180 digit Brillhart-Lehmer-Selfridge provable triplet in Oct 2019:

p = (72865897*809857*4801#*(809857*4801#+1)+210)*(809857*4801#-1)/35+1
Forum: And now for something completely different 2019-05-15, 19:50
Replies: 48
Views: 28,142
Posted By paulunderwood
According to the wiki page...

According to the wiki page (https://en.wikipedia.org/wiki/Sexy_prime#Sexy_prime_quadruplets) we now have a record quadruplet:

"n May 2019 Marek Hubal announced a 1138-digit quadruplet with p =...
Forum: And now for something completely different 2019-05-08, 17:31
Replies: 48
Views: 28,142
Posted By paulunderwood
You should update...

You should update https://en.wikipedia.org/wiki/Sexy_prime#Sexy_prime_triplets
Forum: And now for something completely different 2019-04-25, 15:13
Replies: 48
Views: 28,142
Posted By paulunderwood
You guess right. The "status page" is bookmarked....

You guess right. The "status page" is bookmarked. :smile:
Forum: And now for something completely different 2019-04-25, 15:09
Replies: 48
Views: 28,142
Posted By paulunderwood
It is based on this puny number:...

It is based on this puny number: https://www.mersenneforum.org/showpost.php?p=514447&postcount=15

Please go for it!
Forum: And now for something completely different 2019-04-24, 18:12
Replies: 48
Views: 28,142
Posted By paulunderwood
~50% factorisation of N+1 is given by...

~50% factorisation of N+1 is given by https://primes.utm.edu/primes/page.php?id=11814 and so leads to a quick BLS proof:

/pfgw64 -tp -hsexy.helper -q"(187983281*2^51478+4)*(5*2^51478-1)-1"
PFGW...
Forum: And now for something completely different 2019-04-24, 15:32
Replies: 48
Views: 28,142
Posted By paulunderwood
Congrats, Serge :toot: I am searching for a...

Congrats, Serge :toot:

I am searching for a sexy prime triplet (https://en.wikipedia.org/wiki/Sexy_prime#Sexy_prime_triplets). Do you care to outdo my efforts?
Forum: And now for something completely different 2019-04-23, 19:07
Replies: 48
Views: 28,142
Posted By paulunderwood
Off-topic: Indeed! Congrats for...

Off-topic: Indeed! Congrats for 425521077* 2^3321910 - 1 (https://primes.utm.edu/primes/page.php?id=126414) (1,000,004 digits) :toot:

And for the new world record for a triplet:...
Forum: And now for something completely different 2019-04-23, 02:16
Replies: 48
Views: 28,142
Posted By paulunderwood
./pfgw64 -t...

./pfgw64 -t -q"5298*(1*2^8922-0)+709263602*(883*(1*2^8922-0)^2+1*2^8922-0)+1"
PFGW Version 3.7.10.64BIT.20150809.x86_Dev [GWNUM 28.7]

Primality testing...
Forum: And now for something completely different 2019-04-22, 05:54
Replies: 48
Views: 28,142
Posted By paulunderwood
Drat, drat and double drat! I am searching for a...

Drat, drat and double drat! I am searching for a ~20681 digit pair and was hoping to be the champion.
Forum: And now for something completely different 2019-04-20, 21:54
Replies: 48
Views: 28,142
Posted By paulunderwood
When searching for arithmetic progressions we...

When searching for arithmetic progressions we have always used primorials -- I think this sexy types are similar, but I willing to give it another shot without them.

I downloaded and successfully...
Forum: And now for something completely different 2019-04-20, 19:43
Replies: 48
Views: 28,142
Posted By paulunderwood
I just can't my sieves to behave :down: ...

I just can't my sieves to behave :down:

Moreover, I feel that any record breaking sexy pair needs to involve primorials in order to get the required density when searching.
Forum: And now for something completely different 2019-04-20, 11:12
Replies: 48
Views: 28,142
Posted By paulunderwood
I did not get far. I have now written a...

I did not get far.

I have now written a sieve in pari-gp (which I will convert to PrimeSieve+GMP) and am testing the world record contender:

p=c*(3*2^34350+1)*2^34350+6*(3*2^34350+1)-5 :smile:
Forum: And now for something completely different 2019-04-20, 03:44
Replies: 48
Views: 28,142
Posted By paulunderwood
I am working on 34350 using -f -o of pfgw for...

I am working on 34350 using -f -o of pfgw for "-1" as feedback to pfgw -f later on an ABC file with +5 & -1 in the header...
Showing results 1 to 22 of 22

 
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