is 2 2376293 - 1
has 715336 decimal digits
takes 0.161 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L57DACD8F5A36DE45double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.504367.1642%2000000600000000.50557.6075%13.009869.6622%2.4980%
PrimeNet2590.032362.7119%100001700000.00182.4750%0.034263.6347%0.9229%
GPU722630.671665.0794%100001400000.00171.2722%0.673365.5236%0.4443%
Difference+4+11.8327+2.0848%+1990000+59860000+0.5038+6.3353%+12.3365+4.1385%+4.1385%

Known prime factors (1 factor, 68.1 bits, 0.00286789% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
23762933273746728266974616972168.15068883482135136
25 × 3 × 52813 × 13586357
2015-06-21528131358635750.1100.07740.1354

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.287%
2010-11-07T17:04:00Jocelyn LaroucheManual testing1500015000---0.001--0.243%
2010-11-15T22:51:00Jocelyn LaroucheManual testing2000020000---0.002--0.310%
2010-12-29T07:19:00markrtiny1000002025000---0.020--2.713%
2014-09-10T00:51:00Jocelyn LaroucheManual testing127010127010---0.012--1.074%
2018-09-28T16:24:32alpertronManual testing20000006000000012-
skipped known factor: 327374672826697461697
--0.505--7.607%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-07-26T00:00:00ANONYMOUSv4_computers21259--0.032--
2022-03-09T16:37:54LordJuliusManual testing21260--0.065--
2009-01-15T00:50:00Sturle Sundegolli.ifi260261--0.065--
2012-05-31T16:43:00Sebastian HornbostelManual testing261262--0.129--
2013-01-23T08:26:00dbaughManual testing262263--0.413--
2015-03-09T12:35:00VictordeHollanderManual testing263264--0.826--
2015-03-09T12:35:00VictordeHollanderManual testing264265--1.572--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.156 GHz-days
Estimated T-Level:0.650
DigitsB1CurvesCompleteFacMiss
201100013 / 1000.13087.752%
255000013 / 2800.04695.455%

New Calculation Method

Total ECM effort:1.156 GHz-days
Estimated T-Level:0.650
DigitsB1CompleteFacMiss
20110000.50060.653%
25500000.04695.479%
302500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.067
50000500000010.089


Lucas-Lehmer results:
No L-L results for M2376293


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:24:42alpertronManual testing
327374672826697461697
8AA9CD7E8002D8__no
2017-11-02T03:08:48Oliver KruseGTX-1
327374672826697461697
8AA9CD7E8002D8__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 100000, B2 = 2025000 (P-1 stage 2)
B1 = 127010 (P-1 stage 1)
B1 = 100000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
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104
105
106
107
102
103
104
105
106
107
108
TF factor-bounds graph:
267
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-09T16:37:54+00:00