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-   -   S/R Base 5 Primes reported in 2016 (https://www.mersenneforum.org/showthread.php?t=20847)

 Joe O 2016-01-15 00:59

S/R Base 5 Primes reported in 2016

rank prime digits who when comment

50 306398 · 5^2112410 - 1 1476517 L4274 Jan 2016

 Joe O 2016-03-08 18:23

rank prime digits who when

53 77072 · 52139921 + 1 1495746 L4340 Mar 2016

 Joe O 2016-03-16 21:33

Aus_Karlos found the world record base 5 mega prime 92158*5^2145024+1. This prime is 1,499,313 digits long.

This eliminates k=92158 from the base 5 Sierpinski problem, leaving 33 k's remaining. The base 5 Riesel problem has 77 k's remaining.

 Joe O 2016-03-28 15:00

rank prime digits who when

50 296024 · 5^2185270 - 1 1527444 L671 Mar 2016

 Joe O 2016-06-04 02:26

The 1,549,387 digit SR5 prime 53546*5^2216664-1 was discovered on May 30th.

 Joe O 2016-08-21 17:47

Congratulations to 288larsson for finding our 6th SR5 prime of the year,
The prime 180062*5^2249192-1 eliminates k=180062 from the base 5 Riesel problem. 74 ks remain.

This is largest known base 5 prime, and the 48th largest known prime overall.

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