2 554 231 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
168579247	9	27.3	old
72980407655161	14	46.1	2014-02-04 11:22:02

ECM

Digits	B1	Curves
25	50000	130 / 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	BF6B4AD5083C4304	2	1964182	5	3
Verified	PRP without proof (not generated)	2017-12-01	storm5510	BF6B4AD5083C4304	2	2059528	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-01	storm5510	C-PRP	M2554231/168579247/72980407655161 : BF6B4AD5083C4304
2017-10-14	Oliver Kruse	C-PRP	M2554231/168579247/72980407655161 : BF6B4AD5083C4304
2014-02-04	TJAOI	F	Factor: 72980407655161

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