2 641 889 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
48538560057409	14	45.5	old
2718540113525634721	19	61.2	2016-04-12 11:45:12

ECM

Digits	B1	Curves
25	50000	83 / 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)	2017-10-18	Oliver Kruse	A789CC502BB58A58	2	605914	5	3
Verified	PRP without proof (not generated)	2017-12-03	storm5510	A789CC502BB58A58	2	2418889	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-03	storm5510	C-PRP	M2641889/48538560057409/2718540113525634721 : A789CC502BB58A58
2017-10-18	Oliver Kruse	C-PRP	M2641889/48538560057409/2718540113525634721 : A789CC502BB58A58
2016-04-12	TJAOI	F	Factor: 2718540113525634721

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