1 152 527 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

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

No factors below 2⁶⁹

TF target 2⁶⁰

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

P-1

B1 =	150000000
B2 =	505188233550

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

Status	Date	User	Residue	Shift
Verified		David Slowinski	1697	0
Verified		Larry Deem	B80891DC83313697	0
Verified	2002-07-14	S57483	B80891DC83313697	272871
Verified	2016-06-01	MadPoo	B80891DC83313697	536806

Status	Date	User	Residue	Shift	Type	Base
Verified	2020-11-05	Ethan O'Connor	A0E053C3DB2D51E4	38928	1	3

History

Date	User	Type	Result
2025-01-22	timc995	NF-PM1	B1=150000000, B2=505188233550
2023-07-22	mikr	NF-PM1	B1=15000000, B2=52081146810
2022-11-13	Joss	NF-PM1	B1=1152527, B2=12482419950
2022-10-11	Numberwang	NF-PM1	B1=119000, B2=5455850400
2021-10-05	MadPoo	NF	no factor from 2^68 to 2^69
2020-11-05	homes32	CERT	PRP Certification CERT proof power = 6 Proof certified good
2020-11-05	Ethan O'Connor	C-PRP	A0E053C3DB2D51E4 PRP proof power = 6 PRP: Verified Proof certified good
2019-10-21	_p95holder_	NF	no factor from 2^67 to 2^68
2018-10-12	Joss	NF-PM1	B1=1152527, B2=126777970, E=12
2018-04-29	Joss	NF-PM1	B1=1152527, B2=115252700, E=12
2018-03-31	Joss	NF-PM1	B1=1152527
2017-02-28	Smok_bmv	NF	no factor from 2^66 to 2^67
2016-06-01	MadPoo	C-LL	B80891DC83313697
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-11-21	SRJ2877	NF-PM1	B1=5000000, B2=100000000, E=12
2015-08-10	omylist	NF	no factor from 2^65 to 2^66
2015-01-10	lycorn	NF	no factor from 2^64 to 2^65
2014-12-28	Matthias Wurtinger	NF	no factor from 2^63 to 2^64
2012-10-07	dbaugh	NF	no factor from 2^62 to 2^63
2012-02-02	markr	NF-PM1	B1=500000, B2=10000000, E=12
2011-05-09	megavink	NF	no factor from 2^61 to 2^62
2009-02-15	Sturle Sunde	NF	no factor from 2^60 to 2^61

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