20160115, 00:59  #1 
Aug 2002
525_{10} Posts 
S/R Base 5 Primes reported in 2016
rank prime digits who when comment
50 306398 · 5^2112410  1 1476517 L4274 Jan 2016 
20160308, 18:23  #2 
Aug 2002
3×5^{2}×7 Posts 
rank prime digits who when
53 77072 · 52139921 + 1 1495746 L4340 Mar 2016 
20160316, 21:33  #3 
Aug 2002
3·5^{2}·7 Posts 
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. 
20160328, 15:00  #4 
Aug 2002
3×5^{2}×7 Posts 
rank prime digits who when
50 296024 · 5^2185270  1 1527444 L671 Mar 2016 
20160604, 02:26  #5 
Aug 2002
3·5^{2}·7 Posts 
The 1,549,387 digit SR5 prime 53546*5^22166641 was discovered on May 30th.

20160821, 17:47  #6 
Aug 2002
3×5^{2}×7 Posts 
Congratulations to 288larsson for finding our 6th SR5 prime of the year,
The prime 180062*5^22491921 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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