is 2 3021061 - 1
has 909430 decimal digits
takes 0.257 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L8FB3193F45C790E3double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26819.729867.6471 %32689782186331757416.343013.4726 %36.072872.0059 %
Target2641.178265.6250 %1300011000000.00891.4283 %1.187166.1160 %
Difference+4+18.5516+2.0221 %+32676782+1862217574+16.3341+12.0444%+34.8857+5.8899 %

Known prime factors (1 factor, 71.2 bits, 0.00235530% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
302106126293036332313424349592271.155435162287890139
61 × 683 × 10444814053
2020-10-2668310444814053158.2570.229131.17

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-12-23Team Prime Ribv4_computers1000010000--0.0010.314%
2004-02-07ANONYMOUSv4_computers2048204800--0.0020.570%
2009-06-12Roman MaznichenkoManual testing5000050000006--0.0394.189%
2012-03-25Squeeky_SquirrelP4_260020000047000006--0.0555.202%
2017-04-25mikrMSI300000010000000012--1.02210.962%
2019-10-15oodairacom532689782186331757412--16.3417.136%
2021-01-14JossManual testing302106302106---2.479%
2021-01-14JossManual testing30210630210616---4.961%
2022-01-23JossManual testing1072145119912100--1.14910.475%
2022-09-07JossManual testing1072145226749600--2.03611.352%


Trial Factoring results:
575859606162636465666768
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-03-09ANONYMOUSv4_computers212590.013
1999-05-09nysvv4_computers212600.025
1999-06-06nysvv4_computers212600.025
2009-01-26Jayson Kingatlas2602610.051
2010-09-24Sid & AndyBuzz2612620.102
2013-01-07dbaughManual testing2622630.325
2015-02-07VictordeHollanderManual testing2632640.650
2015-02-07VictordeHollanderManual testing2642651.237
2015-06-01ThaManual testing2652662.474
2017-04-30Gordon SpenceManual testing2662674.947
2018-07-16ramgeisManual testing2672689.89


ECM factoring results:
Total ECM effort:2.801 GHz-days
Estimated T-Level:4.808
DigitsB1CompleteFacMiss
20110000.96238.230%
25500000.08991.487%
302500000.00699.440%


ECM Summary

B1B2factorcurvesGHz-days
500005000000222.452
50000500000030.349


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-04-05ANONYMOUSv4_computers8FB3193F45C790E30.257
1999-05-23nysvv4_computers8FB3193F45C790E30.257
1999-06-06nysvv4_computers8FB3193F45C790E30.257


PRP results:
dateuseridcompidcofactorsres64
2020-10-27ATHec2-PRPCF
2629303633231342434959
A41F9CBC7A883E9C


CERT results:
dateuseridcompid
2020-10-27curtischum110--39l


P-1 factor-bounds graph:
B1 = 32689782, B2 = 1863317574 (P-1 stage 2)
B1 = 32689782 (P-1 stage 1)
B1 = 1072145, B2 = 226749600 (P-1 stage 2)
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 1072145, B2 = 119912100 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1072145 (P-1 stage 1)
B1 = 302106, B2 = 3021061 (P-1 stage 2)
B1 = 200000, B2 = 4700000 (P-1 stage 2)
B1 = 50000, B2 = 5000000 (P-1 stage 2)
B1 = 302106 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
101
102
103
104
105
106
107
108
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
268
267
266
265
264
263
262
261
260
259
this exponent TF target: 64
TF double-checked to: 67
ECM T-Level=4.81 ~= -1-bit
250
260
270
280
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Last modified: 2024-02-09T03:30:02+00:00