223

This number is a prime.

Just showing those entries submitted by 'Rivera': (Click here to show all)

+ The starting prime of a sequence of five primes following this rule: The Kth prime is obtained from the previous one substituting each digit d by d^K: 223, 449, 6464729, 129625612962562401166561, 1325904977763231257776132590497776323125777632102401177767776312577761. [Rivera]

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