2 638 589 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
36940247	8	25.1	old
2000050463	10	30.9	2008-07-14 20:29:18

ECM

Digits	B1	Curves
25	50000	129 / 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)	2017-10-18	Oliver Kruse	B6F772DFF844D5E0	2	988072	5	3
Verified	PRP without proof (not generated)	2017-12-02	storm5510	B6F772DFF844D5E0	2	2083611	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	M2638589/36940247/2000050463 : B6F772DFF844D5E0
2017-10-18	Oliver Kruse	C-PRP	M2638589/36940247/2000050463 : B6F772DFF844D5E0
2008-07-14	George Woltman	F-ECM	Factor: 2000050463

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