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Search: Posts Made By: GP2
Forum: Data 2021-04-18, 16:22
Replies: 559
Views: 84,970
Posted By GP2
There are now 355 known Mersenne numbers with...

There are now 355 known Mersenne numbers with prime exponent that are composite and either fully factored or probably fully factored.

The most recent is M4507. Its final factor (53 digits) was...
Forum: Data 2021-04-07, 16:33
Replies: 559
Views: 84,970
Posted By GP2
The 354th fully-factored or...

The 354th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M5393.

The most recent factor (58 digits) was found by...
Forum: Data 2021-03-27, 14:46
Replies: 559
Views: 84,970
Posted By GP2
The 353rd fully-factored or...

The 353rd fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M7013.

The most recent factor (49 digits) was found by...
Forum: Data 2021-03-26, 06:28
Replies: 559
Views: 84,970
Posted By GP2
The 352nd fully-factored or...

The 352nd fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M7669.

The most recent factor (47 digits) was found by...
Forum: Data 2021-03-20, 19:52
Replies: 559
Views: 84,970
Posted By GP2
The 351st fully-factored or...

The 351st fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M8233.

The most recent factor (47 digits) was found by...
Forum: Data 2020-12-17, 01:23
Replies: 559
Views: 84,970
Posted By GP2
The 349th fully-factored or...

The 349th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M1489.

The most recent factor (60 digits) was found by...
Forum: Data 2020-10-07, 01:00
Replies: 559
Views: 84,970
Posted By GP2
As of this writing, this hasn't got a...

As of this writing, this hasn't got a certification. FactorDB did not assign one automatically, the exponent must be too big.

Edit: now it's certified.
Forum: Data 2020-10-01, 18:13
Replies: 559
Views: 84,970
Posted By GP2
The 348th fully-factored or...

The 348th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M4349.

The most recent factor (41 digits) was found by...
Forum: Data 2020-09-08, 23:51
Replies: 559
Views: 84,970
Posted By GP2
The 347th fully-factored or...

The 347th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M2029.

The most recent factor (58 digits) was found by...
Forum: Data 2020-07-09, 05:20
Replies: 559
Views: 84,970
Posted By GP2
M10,443,557 has been reported fully factored. ...

M10,443,557 has been reported fully factored.

This would be a new record. The previous record-holder was M7,313,983
Forum: Data 2020-02-01, 02:17
Replies: 559
Views: 84,970
Posted By GP2
The 343rd fully-factored or...

The 343rd fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M2749.

The most recent factor (65 digits!) was found by...
Forum: Data 2020-01-18, 04:48
Replies: 559
Views: 84,970
Posted By GP2
The 342nd fully-factored or...

The 342nd fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M2887.

The most recent factor (56 digits) was found by...
Forum: YAFU 2020-01-02, 15:01
Replies: 82
Views: 49,566
Posted By GP2
grep flags /proc/cpuinfo should show which...

grep flags /proc/cpuinfo should show which specific subsets of the AVX-512 instruction set are supported. For instance, the CPU I use has avx512f avx512dq avx512cd avx512bw avx512vl. For the...
Forum: And now for something completely different 2019-12-20, 23:46
Replies: 53
Views: 10,844
Posted By GP2
If Batalov can vouch for the validity of these...

If Batalov can vouch for the validity of these new entries he could add them to OEIS.
Forum: Data 2019-12-08, 21:53
Replies: 559
Views: 84,970
Posted By GP2
The 341st fully-factored or...

The 341st fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M3467.

The most recent factor (55 digits) was found by...
Forum: Data 2019-12-08, 04:10
Replies: 559
Views: 84,970
Posted By GP2
By reading this thread :smile:

By reading this thread :smile:
Forum: Data 2019-12-08, 03:41
Replies: 559
Views: 84,970
Posted By GP2
The 340th fully-factored or...

The 340th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M3733.

The most recent factor (53 digits) was found by...
Forum: FactorDB 2019-12-06, 05:50
Replies: 39
Views: 15,944
Posted By GP2
Yes, there were a lot of cases with exponents...

Yes, there were a lot of cases with exponents below 15000 where FactorDB forgot the connection between a composite number and its factors. For example, 2^293-1 was listed as an 89-digit composite...
Forum: Data 2019-11-27, 18:12
Replies: 559
Views: 84,970
Posted By GP2
Nope, nothing in the spam folder. Not a...

Nope, nothing in the spam folder.

Not a problem, unless it's a symptom of e-mail problems that might crop up again the next time a Mersenne prime is found.
Forum: Data 2019-11-27, 15:25
Replies: 559
Views: 84,970
Posted By GP2
The 339th fully-factored or...

The 339th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M216317.

The most recent factor was found by...
Forum: Wagstaff PRP Search 2019-11-23, 00:51
Replies: 6
Views: 2,814
Posted By GP2
Renaud and Henri Lifchitz mentioned this relation...

Renaud and Henri Lifchitz mentioned this relation in a 2000 paper (http://www.primenumbers.net/Documents/TestNP.pdf), see section 4. Note: they use Np to denote what we call Wp.

As they point...
Forum: Factoring 2019-11-17, 04:03
Replies: 512
Views: 84,993
Posted By GP2
2^1429+1 has a 47-digit factor:...

2^1429+1 has a 47-digit factor: 11485943839018053479863036296614076404887447123
Forum: Hardware 2019-11-09, 04:12
Replies: 20
Views: 4,057
Posted By GP2
Are they still available? I thought they...

Are they still available? I thought they discontinued them.

How noisy are they, by the way.
Forum: Science & Technology 2019-10-29, 17:25
Replies: 2,888
Views: 218,071
Posted By GP2
"Tiny". It's roughly the size of Massachusetts....

"Tiny". It's roughly the size of Massachusetts. Twelve times larger than the Isle of Man.
Forum: Data 2019-10-29, 14:10
Replies: 559
Views: 84,970
Posted By GP2
The 338th fully-factored or...

The 338th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M1723.

The 51-digit most recent factor was found by Ryan...
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