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 2022-02-19, 12:15 #23 pinhodecarlos     "Carlos Pinho" Oct 2011 Milton Keynes, UK 10011101100012 Posts Congratulations Dr. Ryan.
 2022-06-16, 13:02 #24 kar_bon     Mar 2006 Germany 24·5·37 Posts 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.
2022-06-17, 03:40   #25
rudy235

Jun 2015
Vallejo, CA/.

22·277 Posts

Quote:
 Originally Posted by kar_bon 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)

2022-06-20, 10:05   #26
gd_barnes

May 2007
Kansas; USA

10,889 Posts

Quote:
 Originally Posted by kar_bon 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.

 2022-06-20, 21:59 #27 pepi37     Dec 2011 After milion nines:) 22·383 Posts 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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