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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