Title:
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Congruences for Wolstenholme primes (English) |
Author:
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Meštrović, Romeo |
Language:
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English |
Journal:
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Czechoslovak Mathematical Journal |
ISSN:
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0011-4642 (print) |
ISSN:
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1572-9141 (online) |
Volume:
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65 |
Issue:
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1 |
Year:
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2015 |
Pages:
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237-253 |
Summary lang:
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English |
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Category:
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math |
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Summary:
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A prime $p$ is said to be a Wolstenholme prime if it satisfies the congruence ${2p-1\choose p-1} \equiv 1 \pmod {p^4}$. For such a prime $p$, we establish an expression for ${2p-1\choose p-1}\pmod {p^8}$ given in terms of the sums $R_i:=\sum _{k=1}^{p-1}1/k^i$ ($i=1,2,3,4,5,6)$. Further, the expression in this congruence is reduced in terms of the sums $R_i$ ($i=1,3,4,5$). Using this congruence, we prove that for any Wolstenholme prime $p$ we have $$ \left ({2p-1\atop p-1}\right ) \equiv 1 -2p \sum _{k=1}^{p-1}\frac {1}{k} -2p^2\sum _{k=1}^{p-1}\frac {1}{k^2}\pmod {p^7}. $$ Moreover, using a recent result of the author, we prove that a prime $p$ satisfying the above congruence must necessarily be a Wolstenholme prime. Furthermore, applying a technique of Helou and Terjanian, the above congruence is given as an expression involving the Bernoulli numbers. (English) |
Keyword:
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congruence |
Keyword:
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prime power |
Keyword:
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Wolstenholme prime |
Keyword:
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Wolstenholme's theorem |
Keyword:
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Bernoulli number |
MSC:
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05A10 |
MSC:
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11A07 |
MSC:
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11B65 |
MSC:
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11B68 |
MSC:
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11B75 |
idZBL:
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Zbl 06433732 |
idMR:
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MR3336036 |
DOI:
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10.1007/s10587-015-0171-8 |
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Date available:
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2015-04-01T12:38:50Z |
Last updated:
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2020-07-03 |
Stable URL:
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http://hdl.handle.net/10338.dmlcz/144224 |
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Reference:
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