S/R Base 5 Primes reported in 2016
 

rank prime digits who when comment

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

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53 77072 · 52139921 + 1 1495746 L4340 Mar 2016

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.

rank prime digits who when

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

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

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.