1395*2^1377793-1 (414761 digits)

1209*2^1378600-1 (415004 digits)

From the First Megabit Drive:

69*2^2410035-1 (725495 digits)

And congrats to Pepi on a nice k=17 prime!

4163*2^1234360-1 (371584 digits)

1001*2^1381338-1 (415828 digits)

1077*2^1382270-1 (416108 digits)

1047*2^1383252-1 (416404 digits)

4197*2^1245038-1 (374798 digits)

4117*2^1245557-1 (374954 digits)

[URL="http://primes.utm.edu/primes/page.php?id=114452"]33*2^2118570-1[/URL] (637755 digits)

2145*2^973949-1 (293192 digits) is prime.