1 952 837 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
70618682508693284389769	23	75.9	2020-04-11 22:12:21

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 640

Estimated T-Level: 25.8 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Emilio Anzon	1E49B501BB0F89A7	0
Verified (Factored)	1999-01-10	Gary Untermeyer	1E49B501BB0F89A7	596908
Verified (Factored)	2015-07-10	MadPoo	1E49B501BB0F89A7	1771873

Status	Date	User	Residue	Shift	Type	Base
Verified (Factored)	2025-09-02	Kriesel	BE24B3BD7E2AE2D0	0	1	3

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2020-04-12	M Miller	BE24B3BD7E2AE2D0	1	1382955	5	3
Verified	2020-04-13	marssystems	BE24B3BD7E2AE2D0	1	1151291	5	3

History

Date	User	Type	Result
2025-09-03	Jurzal	CERT	PRP Certification CERT proof power = 6 Proof certified good
2025-09-02	Kriesel	C-PRP	BE24B3BD7E2AE2D0 PRP proof power = 6 PRP: Verified (Factored) Proof certified good
2020-04-13	marssystems	C-PRP	M1952837/70618682508693284389769 : BE24B3BD7E2AE2D0 PRP: Verified PRP without proof (not generated)
2020-04-12	M Miller	C-PRP	M1952837/70618682508693284389769 : BE24B3BD7E2AE2D0 PRP: Verified PRP without proof (not generated)
2020-04-11	Sergey Nosov	F-ECM	Factor: 70618682508693284389769 / (ECM curve 1, B1=50000, B2=5000000)
2019-05-13	chuenkit	NF	no factor from 2^67 to 2^68
2018-11-26	Joss	NF-PM1	B1=1952837, B2=244104625, E=12
2018-05-10	Joss	NF-PM1	B1=1952837, B2=195283700, E=12
2018-03-02	Joss	NF-PM1	B1=1952837, B2=120000000, E=12
2018-02-12	Joss	NF-PM1	B1=1952837, B2=60000000, E=12
2018-02-12	TJAOI	NF	no factor from 2^66 to 2^67
2018-01-15	Joss	NF-PM1	B1=1952837, B2=30000000, E=12
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
2015-09-06	ramgeis	NF	no factor from 2^65 to 2^66
2015-07-10	MadPoo	C-LL	1E49B501BB0F89A7
2015-04-23	lycorn	NF	no factor from 2^64 to 2^65
2015-04-23	lycorn	NF	no factor from 2^63 to 2^64
2011-08-27	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2011-05-16	kurly	NF-PM1	B1=1000000, B2=30000000, E=12
2010-01-17	S485122	NF	no factor from 2^60 to 2^61

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