1 193 839 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

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

Factored

Factor	Digits	Bits	Date
149884193434518399694121	24	77.0	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 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
Verified (Factored)		Joel Smith	88741B7182ACCCDE	0
Verified (Factored)		Cornelius Caesar	88741B7182ACCCDE	0

Status	Date	User	Residue	Shift	Type	Base
Verified (Factored)	2025-09-01	Kriesel	4DF207B57D10B8D8	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-29	Oliver Kruse	EA0AF24384309589	1	0	1	3
Verified	2017-10-17	Oliver Kruse	EA0AF24384309589	1	321315	1	3
Verified	2018-01-03	ATH	EA0AF24384309589	1	508050	1	3

History

Date	User	Type	Result
2025-09-02	Chuck	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-01	Kriesel	C-PRP	4DF207B57D10B8D8 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2024-03-11	USAFSS	NF-PM1	B1=600000, B2=985092570
2018-01-03	ATH	C-PRP	M1193839/149884193434518399694121 : EA0AF24384309589 PRP: Verified PRP without proof (not generated)
2017-10-17	Oliver Kruse	C-PRP	M1193839/149884193434518399694121 : EA0AF24384309589 PRP: Verified PRP without proof (not generated)
2017-09-29	Oliver Kruse	C-PRP	M1193839/149884193434518399694121 : EA0AF24384309589 PRP: Verified PRP without proof (not generated)