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[ September 12, 1999 ] All we need to perform is adding to it the sum of its prime factors. This gives the ending prime 93683. ( Note : sometimes more iterations are needed to reach an ending prime.) 93639 + 3 + 7 + 7 + 7 + 7 + 13 = 93683 The uniqueness exists therein that there is NO OTHER PRIME between 93639 and 93683 ! It is easily stated of course, so can you find a second palindrome with this property ? [ Visit and participate also Carlos Rivera's Puzzle #66.] | |||
A000060 Prime Curios! Prime Puzzle Wikipedia 60 Le Nombre 60 Numberland 60 |
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