1 828 727 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
22924921673	11	34.4	old
139694756291501417	18	57.0	2015-05-13 11:29:44

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Type	Base
Verified (Factored)	2025-09-02	Kriesel	C45FC1CBE36D291F	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-04	Oliver Kruse	6B9A0FD18AF5094D	2	0	1	3
Verified	2017-11-06	kkmrkkblmbrbk	6B9A0FD18AF5094D	2	389633	1	3

History

Date	User	Type	Result
2025-09-03	EthanD	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-02	Kriesel	C-PRP	C45FC1CBE36D291F PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2017-11-06	kkmrkkblmbrbk	C-PRP	M1828727/22924921673/139694756291501417 : 6B9A0FD18AF5094D PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1828727/22924921673/139694756291501417 : 6B9A0FD18AF5094D PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2015-05-13	TJAOI	F	Factor: 139694756291501417 / TF: 56-57