2 571 553 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 3 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
232442675671	12	37.8	old
110955149245238421911	21	66.6	2020-06-09 11:24:10
1715494961350362469583	22	70.5	2025-06-29 13:35:17

ECM

Digits	B1	Curves
25	50000	71 / 280

Estimated T-Level: 21.3 ⓘ

TF below 2^66 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-15	Oliver Kruse	49A224C336181E86	1	1859997	5	3
Verified (Factored)	2017-12-01	storm5510	49A224C336181E86	1	2437444	5	3
Verified (Factored)	2020-06-11	M Miller	49A224C336181E86	2	210441	5	3
Verified	2025-06-29	feather	49A224C336181E86	3	1189416	5	3

History

Date	User	Type	Result
2025-06-29	Fabrice Bellet	CERT	PRP Certification Proof certified good
2025-06-29	feather	C-PRP	M2571553/232442675671/110955149245238421911/1715494961350362469583 : 49A224C336181E86 PRP proof power = 7 PRP: Verified Proof certified good
2025-06-29	feather	F-ECM	Factor: 1715494961350362469583 / (ECM curve 8, B1=65384, B2=12107550, Edwards Sigma=2636438065540672)
2022-09-01	USAFSS	NF-PM1	B1=300000, B2=258641460
2020-06-11	M Miller	C-PRP	M2571553/232442675671/110955149245238421911 : 49A224C336181E86 PRP: Verified (Factored) PRP without proof (not generated)
2020-06-09	TJAOI	F	Factor: 110955149245238421911 / TF: 66-67
2017-12-01	storm5510	C-PRP	M2571553/232442675671 : 49A224C336181E86 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-15	Oliver Kruse	C-PRP	M2571553/232442675671 : 49A224C336181E86 PRP: Verified (Factored) PRP without proof (not generated)