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Old 2022-02-19, 12:15   #23
pinhodecarlos
 
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"Carlos Pinho"
Oct 2011
Milton Keynes, UK

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Congratulations Dr. Ryan.
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Old 2022-06-16, 13:02   #24
kar_bon
 
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Mar 2006
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One down for the Riesel-base 5 conjecture:

64598 * 5^3769854-1 is prime, 2,635,020 digits, found on 2022-06-14 by PrimeGrid.

Curious: the 5 digits of the k-value appear also in the n-value.

Awaiting official announcement, still some tasks open for this k.
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Old 2022-06-17, 03:40   #25
rudy235
 
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Jun 2015
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Quote:
Originally Posted by kar_bon View Post
One down for the Riesel-base 5 conjecture:

64598 * 5^3769854-1 is prime, 2,635,020 digits, found on 2022-06-14 by PrimeGrid.

Curious: the 5 digits of the k-value appear also in the n-value.

Awaiting official announcement, still some tasks open for this k.

Congratulations!
This is the 97th prime with between 2 million and 3 million digits.

There are 10 primes in total (in that range) of the form k* 5^n +/- 1. (8 with -1 and 2 with +1)
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Old 2022-06-20, 10:05   #26
gd_barnes
 
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May 2007
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Quote:
Originally Posted by kar_bon View Post
One down for the Riesel-base 5 conjecture:

64598 * 5^3769854-1 is prime, 2,635,020 digits, found on 2022-06-14 by PrimeGrid.

Curious: the 5 digits of the k-value appear also in the n-value.

Awaiting official announcement, still some tasks open for this k.
Even more curious: The digits 3 through 9 all occur 1 time in the n-value.
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Old 2022-06-20, 21:59   #27
pepi37
 
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Dec 2011
After milion nines:)

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And there is new one :)


https://primes.utm.edu/primes/page.php?id=134068


63838 *5^3887851-1


2717497 digits, current 99 rank
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