2 499 821 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
3167568185879	13	41.5	old
121732160929365544081	21	66.7	2003-10-31 00:00:00

ECM

Digits	B1	Curves
25	50000	179 / 280

Estimated T-Level: 23.2 ⓘ

TF below 2^72 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored		Paul Foxworthy	14706D02B123D916	0	Windows,Prime95,v14,(aka WQ1)
Factored	1999-05-02	2503000	14706D02B123D916	1060246	Windows,Prime95,v18,(aka WU1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-14	Oliver Kruse	6E9FB62A3F1B8497	2	518181	5	3
Verified	PRP without proof (not generated)	2017-11-30	storm5510	6E9FB62A3F1B8497	2	1492413	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-30	storm5510	C-PRP	M2499821/3167568185879/121732160929365544081 : 6E9FB62A3F1B8497
2017-10-14	Oliver Kruse	C-PRP	M2499821/3167568185879/121732160929365544081 : 6E9FB62A3F1B8497
2008-09-07	Will Edgington	F-ECM	Factor: 121732160929365544081
2003-10-31	Team Prime Rib	F-PM1	Factor: 121732160929365544081
2003-10-23	-anonymous-	NF-PM1	B1=2048, B2=204800
1999-12-01	-anonymous-	C-LL	14706D02B123D916
1999-12-01	-anonymous-	NF	no factor TF: 1-59
1999-11-24	-anonymous-	C-LL	14706D02B123D916
1999-11-24	-anonymous-	NF	no factor TF: 1-59
1999-05-02	-anonymous-	C-LL	14706D02B123D916
1999-05-02	-anonymous-	NF	no factor TF: 1-59