73

This number is a prime.

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There are exactly 73 primes, beginning with the prime 1093 and ending with the prime 1613, where 10932 + 10972 + ... + 16132 = 117072. This is the first instance of a prime number of primes comprising the left member of such an equation. [Haga]

Submitted: 1999-09-02 18:40:00;   Last Modified: 2008-01-30 11:28:00.
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