Sierpinski/Riesel Base 5

project

A titan, as defined by Samuel Yates, is anyone who has found a titanic prime. This page provides data on those that have found these primes. The data below only reflects on the primes currently on the list. (Many of the terms that are used here are explained on another page.)

Proof-code(s):
p187, p188, p196, p201, p202 ... ... L3528, L3849, L3869, L3903, L3904
E-mail address: (e-mail address unpublished)
Web page:http://www.mersenneforum.org/forumdisplay.php?f=54
Username SR5 (entry created on 6/4/2005 21:35:48 UTC)
Database id:768 (entry last modified on 6/28/2014 14:42:32 UTC)
Active primes:on current list: 10, rank by number 11
Total primes: number ever on any list: 158
Production score: for current list 49 (normalized: 70), total 49.4007, rank by score 12
Largest prime: 88444 · 52799269 - 1 ‏(‎1956611 digits) via code L3523 on 6/21/2019 16:56:22 UTC
Most recent: 88444 · 52799269 - 1 ‏(‎1956611 digits) via code L3523 on 6/21/2019 16:56:22 UTC
Entrance Rank: mean 104.21 (minimum 51, maximum 184)

Descriptive Data: (report abuse)

This project is searching for a prime of the form k*5^n-1 for each even k less than 346802, to prove that 346802 is the smallest even base five Riesel number, and k*5^n+1 for each even k less than 159986 to prove that 159986 is the smallest even base five Sierpinski number. The original instigator of this project was Robert Smith who started it all with a post in the mersenneforum.org on 28 Sep 04. http://www.mersenneforum.org/showthread.php?t=3125

Surname: SierpinskiRiesel (used for alphabetizing and in codes).
Unverified primes are omitted from counts and lists until verification completed.
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