2 338 421 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶²

Factored

Factor	Digits	Bits	Date
187073681	9	27.5	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	101 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 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)	2017-10-12	Oliver Kruse	57799FF1A01EFAFC	1	0	1	3
Verified	PRP without proof (not generated)	2017-11-23	storm5510	57799FF1A01EFAFC	1	1863225	1	3

History

Date	User	Type	Result
2021-04-14	ViliamF	NF-PM1	B1=5000000, B2=500000000
2018-03-18	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2017-11-23	storm5510	C-PRP	M2338421/187073681 : 57799FF1A01EFAFC
2017-10-12	Oliver Kruse	C-PRP	M2338421/187073681 : 57799FF1A01EFAFC

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