Lennart found 845*2^991358-1 is prime.

819*2^981008-1
If finally happened.

871*2^995093-1 is prime

851*2^999854-1 is Prime
825*2^999698-1 is Prime

Lennart:threadhijacked::grin::grin:

497*2^1000426-1 is Prime

321*2^1363671-1 is prime

919*2^996819-1 is prime

[QUOTE=Lennart;265492]851*2^999854-1 is Prime
825*2^999698-1 is Prime

Lennart:threadhijacked::grin::grin:[/QUOTE]
93*2^1493877+1 is Prime

[with (449704 digits), Divides GF(1493871,8) = GF(a,b) = b^2^a +1,

or F_n(a,1), a=8, n=1493871 ... _or_ F_{b,m} = b^2^m+1, b=8, m=1493871]

[QUOTE=bdodson;266773]93*2^1493877+1 is Prime

[with (449704 digits), Divides GF(1493871,8) = GF(a,b) = b^2^a +1,

or F_n(a,1), a=8, n=1493871 ... _or_ F_{b,m} = b^2^m+1, b=8, m=1493871][/QUOTE]

This thread is only for Riesel primes found by NPLB.

[QUOTE=gd_barnes;266818]This thread is only for Riesel primes found by NPLB.[/QUOTE]
My apologies for the distraction. I wasn't able to determine from the
sub-thread title why posting a Proth prime constituted a hijacking.

-bdodson

[QUOTE=kar_bon;265852]321*2^1363671-1 is prime[/QUOTE]

Only ~8k difference the next prime for k=321:

321*2^1371846-1 is prime.