42 379 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
100099199	9	26.6	old
45082525927	11	35.4	2008-08-26 20:00:31
4807043881298273664337	22	72.0	2009-04-22 01:35:41

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	708 / 4588

Estimated T-Level: 35.8 ⓘ

TF below 2^114 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	DE4745B01C08076D	3	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	DE4745B01C08076D	3	0	1	3
Verified	2017-12-07	ATH	DE4745B01C08076D	3	37127	1	3
Unverified	2020-04-17	Oliver Kruse	CECF6DCCA5CDDA__	3	13709	5	3

History

Date	User	Type	Result
2023-04-14	JacobZ	NF-PM1	B1=850000000, B2=618707738528880
2021-03-22	Conductor	F-ECM	Factor: 45082525927 / (ECM curve 1, B1=1000000, B2=100000000, Sigma=1519957858465239)
2020-04-17	Oliver Kruse	C-PRP	M42379/100099199/45082525927/4807043881298273664337 : CECF6DCCA5CDDA__ PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M42379/100099199/45082525927/4807043881298273664337 : DE4745B01C08076D PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M42379/100099199/45082525927/4807043881298273664337 : DE4745B01C08076D PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M42379/100099199/45082525927/4807043881298273664337 : DE4745B01C08076D PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M42379/100099199/45082525927/4807043881298273664337 : DE4745B01C08076D PRP without proof (not generated)
2016-09-19	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=2000000000, E=12
2009-04-22	Matthias Wurtinger	F-ECM	Factor: 4807043881298273664337
2008-08-26	-Anonymous-	F	Factor: 45082525927