1 427 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is PRP (Probable-Prime).

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
19054580564725546974193126830978590503	38	123.8	old

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2017-11-16	kkmrkkblmbrbk	PRP_PRP_PRP_PRP_	1	695	1	3

History

Date	User	Type	Result
2017-11-16	kkmrkkblmbrbk	P-PRP	M1427/19054580564725546974193126830978590503 PRP Cofactor
2000-07-17	-anonymous-	NF	no factor TF: 1-56
2000-01-19	-anonymous-	NF	no factor TF: 54-55
1999-12-08	-anonymous-	NF	no factor TF: 53-54
1999-09-14	-anonymous-	NF	no factor TF: 50-51
1999-09-14	-anonymous-	NF	no factor TF: 52-53
1998-06-20	-anonymous-	NF	no factor TF: 50-52

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