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That's prime. Can someone figure out what's actually going on here? Prime numbers with that many digits shouldn't pop up by pure chance...

I'm sure you all caught this, but the first 3 in the sequence are also prime.

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I'm too busy to check but I'd bet money that it's a Mersenne prime. The series looks exponential (like 2^n) and it's not hard to imagine that fenceposting (±1) led to each member in the series being (2^n)-1 - which is the form for Mersenne primes.

Edit: Dang, I was wrong. ;)

Nope.

http://www.bigprimes.net/cruncher/159591041/

Don't take up gambling. ;)

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