is 2 3577517 - 1
has 1076940 decimal digits
takes 0.376 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCEC1983E4CF647CAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2678.305767.1642%1000001303648501.09615.9723%9.401869.1252%1.9611%
PrimeNet2600.042963.3333%150003000000.00462.9719%0.047664.4230%1.0897%
GPU722640.994965.6250%200004000000.00621.9782%1.001166.3050%0.6800%
Difference+3+7.3108+1.5392%+80000+129964850+1.0899+3.9941%+8.4007+2.8202%+2.8202%

Known prime factors (1 factor, 66.1 bits, 0.00184820% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
3577517801711997369979372092066.12011204866355212
22 × 612 × 752812843
2015-07-1137217528128437.81026.246811.666

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2009-07-09T04:58:00Carsten Kossendeyleela20000245000---0.005--1.112%
2011-12-25T01:17:00Squeeky_SquirrelP4_2600850001572500---0.025--2.636%
2022-03-01T15:51:36Jocelyn LaroucheManual testing100000100000---0.015--1.012%
2022-05-26T12:47:35Jocelyn LaroucheManual testing100000130364850---1.096--5.972%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2009-03-15T08:11:00S485122USB-Z260261--0.043--
2011-06-16T03:59:00markroldgamer261262--0.086--
2012-07-02T04:04:00GrunwalderGIMPManual testing21263--0.446--
2015-01-30T19:16:00VictordeHollanderManual testing263264--0.549--
2015-01-30T19:16:00VictordeHollanderManual testing264265--1.044--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.888 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:0.888 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000060.888


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-21T00:00:00ANONYMOUSv4_computersCEC1983E4CF647CA0.376


PRP results:
dateuseridcompidcofactorsres64PRP
2017-11-09T17:25:54kkmrkkblmbrbkc4.large
80171199736997937209
49C81B26D1D516__no
2017-11-25T07:26:36Oliver KruseThreadripper
80171199736997937209
49C81B26D1D516__no


P-1 factor-bounds graph:
B1 = 100000, B2 = 130364850 (P-1 stage 2)
B1 = 85000, B2 = 1572500 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 85000 (P-1 stage 1)
B1 = 20000, B2 = 245000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2022-05-26T12:47:35+00:00