33213
This number is a composite.
Just showing those entries submitted by 'Bajpai': (Click here to show all)
The smallest semiprime k such that replacing each digit d
in decimal expansion of k with d^2 yields a new semiprime
when done recursively six times, i.e., 33213-> 99419
(semiprime); 99419-> 818116181(semiprime);
818116181-> 6416411361641(semiprime); 6416411361641->
36161361611936136161 (semiprime); 36161361611936136161->
9361361936136118193619361361 (semiprime);
9361361936136118193619361361->
8193619361819361936116418193618193619361 (semiprime). [Bajpai]
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