2 520 689 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 4 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶³

Factored

Factor	Digits	Bits	Date
60496537	8	25.9	old
15386285657	11	33.8	2008-07-14 20:24:34
298041225983	12	38.1	2008-07-14 20:24:34
1853630534877047	16	50.7	2014-06-06 11:33:19

ECM

Digits	B1	Curves
25	50000	131 / 280

Estimated T-Level: 22.3 ⓘ

TF below 2^69 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)	2017-10-14	Oliver Kruse	77FDA6C027683A61	4	1608074	5	3
Verified	PRP without proof (not generated)	2017-11-30	storm5510	77FDA6C027683A61	4	1597608	5	3

History

Date	User	Type	Result
2022-08-21	USAFSS	NF-PM1	B1=240000, B2=199861200
2017-11-30	storm5510	C-PRP	M2520689/60496537/15386285657/298041225983/1853630534877047 : 77FDA6C027683A61
2017-10-14	Oliver Kruse	C-PRP	M2520689/60496537/15386285657/298041225983/1853630534877047 : 77FDA6C027683A61
2014-06-06	TJAOI	F	Factor: 1853630534877047
2008-07-14	George Woltman	F-ECM	Factor: 298041225983
2008-07-14	George Woltman	F-ECM	Factor: 15386285657

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