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| | Puzzle 195. Zero-free primes and its squares |
 | | Primes such that their squares are free of the digit D. Recently I tackled another interesting puzzle (** squares) from the always challenging pages of my friend Frank Rubin. |
 | | Regarding Q.1 For D=2,3,5,6,7,8, The Smallest Titanic Prime 10^999+7 is such that its square is free of digit D. For D=4,9, The Titanic Prime 10^999+3561 is such that its square is free of digit D. A Titanic prime such that its square is free of D for D=1. |
 | | Find one titanic prime (digits=>1000) such that its square is free of the digit D, for each of the following values for D: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9. |
| www.primepuzzles.net /puzzles/puzz_195.htm (634 words) |
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