1 937 329 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite: proven not-prime with both PRP and Lucas-Lehmer tests

No factors below 2⁶⁸

TF target 2⁶²

TF below 2^81 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	18000000
B2 =	57622855290

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	106 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		Marijke van Gans	C097D59C583CD3BF	0
Verified	1998-12-21	Troy Holm	C097D59C583CD3BF	212830
Verified	2015-06-28	MadPoo	C097D59C583CD3BF	251254

Status	Date	User	Residue	Shift	Type	Base
Verified	2025-09-02	Kriesel	2F8B70046E8A5924	0	1	3

History

Date	User	Type	Result
2025-09-03	Carlos Pinho	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-02	Kriesel	C-PRP	2F8B70046E8A5924 PRP proof power = 6 PRP: Verified Proof certified good
2023-10-11	Sid & Andy	NF-PM1	B1=18000000, B2=57622855290
2023-06-17	Joss	NF-PM1	B1=1937329, B2=7976724210
2023-01-11	Joss	NF-PM1	B1=1937329, B2=1635223590
2022-08-15	masser	NF-PP1	Start=2/7, B1=1500000, B2=54000000
2019-05-10	chuenkit	NF	no factor from 2^67 to 2^68
2018-03-28	Joss	NF-PM1	B1=1937329, B2=193732900, E=12
2018-01-31	mikr	NF-PM1	B1=8000000, B2=320000000, E=12
2018-01-08	TJAOI	NF	no factor from 2^66 to 2^67
2017-04-07	Joss	NF-PM1	B1=1415608, B2=14156080, E=12
2017-01-21	Joss	NF-PM1	B1=1179674
2017-01-04	Joss	NF-PM1	B1=983062
2016-12-23	Joss	NF-PM1	B1=819219
2016-12-18	Joss	NF-PM1	B1=682683
2016-12-14	Joss	NF-PM1	B1=568903
2016-02-23	Mark Rose	NF	no factor from 2^62 to 2^63
2016-02-23	Mark Rose	NF	no factor from 2^61 to 2^62
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-10-08	Bruno Victal	NF-PM1	B1=500000, B2=15000000, E=12
2015-09-04	ramgeis	NF	no factor from 2^65 to 2^66
2015-06-28	MadPoo	C-LL	C097D59C583CD3BF
2015-05-09	lycorn	NF	no factor from 2^64 to 2^65
2015-05-09	lycorn	NF	no factor from 2^63 to 2^64
2012-01-26	markr	NF-PM1	B1=275000, B2=6000000, E=12
2011-08-27	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-01-31	S485122	NF	no factor from 2^60 to 2^61

Username
Password