1461*2^404851-1 (121876 digits)
1533*2^445512-1 (134116 digits)
1583*2^374660-1 (112788 digits)
1583*2^422792-1 (127277 digits)
1599*2^463571-1 (139552 digits)

Again, all four values of k (1461, 1533, 1583, 1599) have been tested for n=350-500k.

Congrats to mcduck on yet another megabit prime!

[quote=Kosmaj;151726]Congrats to mcduck on yet another megabit prime![/quote]

I did write a post to this thread but I must have forgotten to submit it (I was very tired last night!)

[URL="http://primes.utm.edu/primes/page.php?id=85868"]217*2^1026869-1[/URL] is prime!

5955*2^646244-1 (194543 digits)

3313*2^928263-1 [279439 digits]

1027*2^631221-1 (190020 digits)
5955*2^652721-1 (196493 digits)

1521*2^416257-1 (125310 digits) (this k tested for n=350-500k)
1573*2^439471-1 (132298 digits) (this k tested for n=350-500k)

37850187375*2^503473-1 (151572 digits) (this k tested to n=515k, continuing)

1545*2^711570-1 (214208)

2397*2^365224-1 (109947)

[URL="http://primes.utm.edu/primes/page.php?id=85967"]15*2^1837873-1[/URL] is prime! (553257 digits)

Thanks to all involved!

Finally the next k=15 prime! Congratulations to mcduck - six primes (including 3 megabit ones) in just 3 months :tu:

1545*2^734144-1 (221003 digits)