Prime related questions

[Jason Earls]

Dear Seqfans,

 I recently found these twin probable primes:

 2357*2^7532+105525
2357*2^7532+105527
(2271 digits)

 Anyone know of databases that keep track of these? They shouldn't be in the 
OEIS, should they?

Also, I was surprised to find that this seq wasn't already in the OEIS:

 n such that 10^n + prime(n) is prime.
2,4,27,63,756,899,

 I used PFGW to check up to 8000 and didn't find anymore.

 Worth submitting?

 Regards,
Jason
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