Saturday, March 26, 2011

Conjecture about sum of primes

1 + 2 + 2^2 + 2^3 + 2^4 = 1 + 5 + 5^2 = 31


Is this the only sum of this kind, using prime numbers?

(2) research with .... a + p + p^2 + p^3 + .... = a + ....

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