103723971119

                                                               10 3723971119

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+ If you replace each digit of the initial prime 103723971119 by its square, you obtain a new prime; and up to seven primes doing this recursively: 103723971119 ->1094949814911181 -> 1081168116816411681111641 -> 106411366411366413616113664111136161 -> 103616119363616119363616193613611936361611119361361 -> 10936136118193693613611819369361361819361936118193693613611118193619361-> 1081936193611641819368193619361164181936819361936164181936181936116418 19368193619361111641819361819361. [Rivera]

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