Prime Curios!: 607565706

607565706
(another Prime Pages' Curiosity)

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A palindrome resulting from this "prime based" expression: (257 + ... + 607)² + (257² + ... + 607²). There are 57 consecutive primes inside each parentheses. Note that this palindrome starts with the last prime added: {607}565706. "57" appears also as a substring, 60756{57}06. The beast number {6}075{6}570{6} is included. [De Geest and Trotter]

Submitted: 2001-12-12 18:15:58; Last Modified: 2008-01-30 11:28:00.