14 249 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
120896124967	12	36.8	old
2407502828203950833	19	61.1	2008-08-29 02:24:34

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	4588 / 4588
45	11000000	1265 / 9201

Estimated T-Level: 40.7 ⓘ

TF below 2^130 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	E5557E4C99872125	2	0	1	3
Verified	2017-10-12	kkmrkkblmbrbk	E5557E4C99872125	2	1124	1	3
Unverified	2020-04-17	Oliver Kruse	EB202020274D20__	2	8461	5	3

History

Date	User	Type	Result
2023-11-30	-Anonymous-	NF-PM1	B1=100000000000, B2=122815096988293710
2023-05-24	JacobZ	NF-PM1	B1=7700000000, B2=32522539163164050
2022-01-24	Ethan O'Connor	NF-PM1	B1=1000000000, B2=3088390743498060
2020-04-17	Oliver Kruse	C-PRP	M14249/120896124967/2407502828203950833 : EB202020274D20__ PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M14249/120896124967/2407502828203950833 : E5557E4C99872125 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M14249/120896124967/2407502828203950833 : E5557E4C99872125 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M14249/120896124967/2407502828203950833 : E5557E4C99872125 PRP without proof (not generated)
2008-08-29	-Anonymous-	F-ECM	Factor: 2407502828203950833