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Search: id:A060520
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| A060520 |
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Primes p that have at least four primitive roots that are not primitive roots mod p^2. |
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+0
3
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| 653, 16631, 40487, 50033, 52517, 67631, 80803, 138107, 145253, 147197
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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40487 is unusual - it has four primitive roots with this property (5, 5^3, 5^5, 4492) and 5 is the least positive primitive root mod 40487 - see A055578.
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EXAMPLE
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13425, 18243, 34196, 38462, 39362 and 51787 are primitive roots mod 52517, but not mod 52517^2.
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CROSSREFS
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Cf. A060503, A055578, A060518, A060519.
Sequence in context: A104823 A145125 A145202 this_sequence A065759 A088894 A015277
Adjacent sequences: A060517 A060518 A060519 this_sequence A060521 A060522 A060523
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KEYWORD
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more,nonn
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AUTHOR
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Jud McCranie (j.mccranie(AT)comcast.net), Mar 24 2001
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