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GIMPS has discovered a new largest known prime number: 2^{82589933}1 (24,862,048 digits) The smallest 4digit prime that is the sum of 9 consecutive primes. [Russo]
Consider a nbyn Ulam spiral of digits from the decimal expansion of . The sequence generated for the maximum number of distinct primes in the standard number search format (i.e., forward/backward along rows, columns, and diagonals) begins 1, 6, 16, 34, 44, ... (G. L. Honaker, Jr., 3/14/15 9:26:53.589...)
5 1 4 *Note that in the 3by3 square, i.e., 9 3 1 , the sum of 16 distinct primes equals 1163. 2 6 5
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