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Search: id:A036944
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| A036944 |
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Smallest n-digit prime containing only digits 4 and 7, or 0 if no such prime exists. |
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+0
2
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| 7, 47, 0, 4447, 44777, 0, 4444747, 44447747, 0, 4444444447, 44444444747, 0, 4444444447777, 44444447447447, 0, 4444444447447777, 44444444444444477, 0, 4444444444444444777, 44444444444444444447, 0, 4444444444444444444747
(list; graph; listen)
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