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| | Problem 4.- Fortune's Conjecture |
 | | This are the first 20 Fortunate primes : 3, 5, 7, 13, 23,17, 19, 23, 37, 61, 67, 61, 71, 47, 107, 59, 61, 109, 89, 103. |
 | | Is this the first and unique known "mechanical" procedure to produce as many prime number (forget for a moment the difficulties) as you want. |
 | | I believe that the procedure of Fortune and that of Carl Pomerance that I generalized (see Problem 2) are the only ones which can existed and which can give primes, but since the time I can’t prove that. |
| www.primepuzzles.net /problems/prob_004.htm (439 words) |
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