1 249 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 4 known prime factors. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
97423	5	16.6	old
52358081	8	25.6	old
2379005273	10	31.1	old
9345276045907272726364012481	28	92.9	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	9201 / 9201
50	44000000	16550 / 16550
55	110000000	40830 / 40830
60	260000000	105362 / 105362
65	800000000	79655 / 194238

Estimated T-Level: 62.1 ⓘ

TF below 2^201 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	No proof (small exponent)	2017-09-27	Oliver Kruse	FBF2F4174247085D	4	0	1	3
Verified	No proof (small exponent)	2017-10-09	Chang Chia-Tche	FBF2F4174247085D	4	0	1	3
Verified	No proof (small exponent)	2017-10-12	kkmrkkblmbrbk	FBF2F4174247085D	4	119	1	3
Verified	No proof (small exponent)	2020-04-17	Oliver Kruse	CE1166266BB625B0	4	955	5	3
Verified	No proof (small exponent)	2020-08-12	_p95holder_	CE1166266BB625B0	4	194	5	3

History

Date	User	Type	Result
2025-09-19	ViliamF	NF-PP1	Start=6/5, B1=50000000000, B2=5000000000000
2025-09-17	ViliamF	NF-PP1	Start=2/7, B1=50000000000, B2=5000000000000
2021-07-19	ViliamF	NF-PP1	Start=2/7, B1=1000000000, B2=221000000000
2021-03-27	nordi	NF-PM1	B1=1000000000000, B2=2232843418649129478
2020-08-12	_p95holder_	C-PRP	M1249/97423/52358081/2379005273/9345276045907272726364012481 : CE1166266BB625B0
2020-04-17	Oliver Kruse	C-PRP	M1249/97423/52358081/2379005273/9345276045907272726364012481 : CE1166266BB625B0
2017-10-12	kkmrkkblmbrbk	C-PRP	M1249/97423/52358081/2379005273/9345276045907272726364012481 : FBF2F4174247085D
2017-10-09	Chang Chia-Tche	C-PRP	M1249/known_factors : FBF2F4174247085D
2017-09-27	Oliver Kruse	C-PRP	M1249/97423/52358081/2379005273/9345276045907272726364012481 : FBF2F4174247085D
2017-09-25	csaba	C-PRP	M1249/known_factors : FBF2F4174247085D
2016-09-07	kkmrkkblmbrbk	NF-PM1	B1=1000000000, B2=100000000000, E=12
2009-10-25	Carsten Kossendey	F	Factor: 12135023569747905111799
2005-01-20	-anonymous-	F	Factor: 12135023569747905111799