1346178405*2^247896-1 (74634 digits)

[QUOTE=Cruelty]I've verified 759237765*2^268641-1 using proth.
Continue: Test of file "prime.txt" at line 100, k*2^n-1.
759237765 268641
759237765*2^268641 - 1 may be prime. (a = 19)
759237765*2^268641 - 1 is prime! (P = 5, Q = -1) [80878 digits]
759237765*2^268641 + 1 factor : 7
759237765*2^268642 - 1 factor : 59
759237765*2^268640 - 1 is composite. (a = 7)
Done.
[/QUOTE]

Does this mean that the number is prime or composite? I mean, one line says it is prime for something and then another says it is composite. I need to know for sure to get the count right for the DC info site. Until I get an answer I will leave it out of the count.

1952775825*2^221012-1

The earlier number posted, 759237765*2^268641 - 1, is prime.
The Proth test also tested the same number+1 and other tests
for twin primes.

17295*2^256769-1 (77300 digits)

From the RPS Drive:

918332415 282017 (84905 digits)

From the RPS drive
3467560635*2^283353-1 (85308 digits)

k=1222853775
 

From Choose your own k:

1222853775*2^262364-1 (78989 digits) is prime

k=1222853775
 

From Choose your own k:

1222853775*2^264388-1 (79598 digits) is prime:banana:

26565*2^306088-1 (92147 digits)

From the RPS drive:
1694614845*2^287699-1 (86616 digits)