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Old 2019-04-08, 19:50   #463
mathwiz
 
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Quote:
Originally Posted by GP2 View Post
The 330th fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M78737.

The 29-digit factor was found by Niels Mache Nextcloud, and the PRP test on Primenet was done by ATH.

If certified prime, the cofactor would be a new record for Mersenne cofactors, beating the current M63703. However it would still be smaller than the Wagstaff prime with exponent 83339.
Is anyone working on a prime certification of the cofactor, with Primo (I'm guessing) or some other tool?
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Old 2019-04-08, 20:02   #464
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Quote:
Originally Posted by mathwiz View Post
Is anyone working on a prime certification of the cofactor, with Primo (I'm guessing) or some other tool?
The trouble with certifying with Primo is that it takes several months and there is no coordination so that people are not stepping on each other's toes. This happened with Peter Kaiser and me with a 29k proof of a Lucas number. As it happened, I took Peter's partially finished work and ran it on my faster computer and we shared the credit. Perhaps a Primo reservation thread might be in order!
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Old 2019-04-13, 20:24   #465
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2377
ryan strikes again
what is the secret ?
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Old 2019-04-13, 20:41   #466
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Quote:
Originally Posted by srow7 View Post
2377

ryan strikes again
what is the secret ?
This puts us over 95% up to 10,000
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Old 2019-04-13, 22:59   #467
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Quote:
Originally Posted by srow7 View Post
2377

ryan strikes again
what is the secret ?
Ryan has one of these:

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Old 2019-04-21, 06:05   #468
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https://www.mersenne.org/report_expo...lo=4159&full=1

4159 Factored 31268686049852386409057899188977231895225891280471760041

2019-04-21 Ryan Propper F-ECM Factor: 31268686049852386409057899188977231895225891280471760041
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Old 2019-04-28, 13:21   #469
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The 331st fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M15359.

The latest factor was found by Niels Mache Nextcloud, and the PRP test on Primenet was done by Anonymous.

FactorDB link
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Old 2019-04-28, 21:37   #470
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Quote:
Originally Posted by GP2 View Post
The 331st fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M15359.

The latest factor was found by Niels Mache Nextcloud, and the PRP test on Primenet was done by Anonymous.

FactorDB link
Congrats to Niels. An easy ECPP for someone.

Last fiddled with by paulunderwood on 2019-04-28 at 21:37
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Old 2019-04-29, 09:37   #471
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Quote:
Originally Posted by paulunderwood View Post
An easy ECPP for someone.
Yep.
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Old 2019-04-30, 05:31   #472
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The 332nd fully-factored or probably-fully-factored Mersenne number with prime exponent (not including the Mersenne primes themselves) is M4111.

This is a semiprime. The 56-digit factor was found by Ryan Propper, and the PRP test on Primenet was done by ATH.

FactorDB link
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Old 2019-06-12, 07:46   #473
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Ryan has been exterminating these small exponents!
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