2 601 463 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 2 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶³

Factored

Factor	Digits	Bits	Date
18147805889	11	34.1	old
377146271159767	15	48.4	2008-09-30 14:37:16

ECM

Digits	B1	Curves
25	50000	85 / 280

Estimated T-Level: 21.5 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-15	Oliver Kruse	A2C8E448948A21B4	2	2506417	5	3
Verified	PRP without proof (not generated)	2017-12-02	storm5510	A2C8E448948A21B4	2	1614488	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-02	storm5510	C-PRP	M2601463/18147805889/377146271159767 : A2C8E448948A21B4
2017-10-15	Oliver Kruse	C-PRP	M2601463/18147805889/377146271159767 : A2C8E448948A21B4
2008-09-30	markr	F	Factor: 377146271159767

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