Repunit R49081 is a probable prime

Dubner, Harvey

doi:10.1090/S0025-5718-01-01319-9

Repunit R49081 is a probable prime
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Math. Comp. 71 (2002), 833-835 Request permission

Abstract:

The Repunit R$49081=(10^{49081}-1)/9$ is a probable prime. In order to prove primality R49080 must be approximately 33.3% factored. The status of this factorization is included.

References

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