is 2 2180527 - 1
has 656405 decimal digits
takes 0.143 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L2BB8A2BE79F288DDdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26954.751368.1159 %25000001250000000.87467.3014 %55.626070.4439 %
Target2620.281764.5161 %110008000000.00511.5688 %0.286965.0728 %
Difference+7+54.4696+3.5998 %+2489000+124200000+0.8695+5.7326%+55.3391+5.3711 %

Known prime factors (1 factor, 82.8 bits, 0.00379951% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
218052787121969935741313725430092582.8491997727382778138352
24 × 33 × 11 × 79 × 977 × 5446758697
2022-06-029775446758697654,53128.29252.841

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2003-03-16ANONYMOUSv4_computers204820480012--0.0010.778%
2011-01-14markrtiny9000016200006--0.0174.439%
2014-06-26ANONYMOUSManual testing119435119435--0.0112.001%
2014-10-10JossManual testing148870148870--0.0142.216%
2016-01-04JossManual testing44354544354506--0.0636.523%
2018-01-22mikrMSI250000012500000012--0.87512.600%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1999-01-29ANONYMOUSv4_computers212580.018
2016-02-23Mark RoseManual testing2582600.053
2009-01-04Sturle Sundefungo.ifi2602610.070
2009-01-07Sturle Sundedietrich.ifi2612620.141
2013-09-13BloodIceManual testing2622630.450
2015-03-25VictordeHollanderManual testing2632652.614
2016-01-15ramgeisManual testing2652663.427
2016-11-24Gordon SpenceManual testing2662676.854
2019-04-22TJAOIManual testing26726813.71
2021-07-15TJAOIManual testing26826927.42


ECM factoring results:
Total ECM effort:17.599 GHz-days
Estimated T-Level:23.626
DigitsB1CompleteFacMiss
20110007.8500.039%
25500000.72548.422%
302500000.04695.533%
3510000000.00299.787%


ECM Summary

B1B2factorcurvesGHz-days
500005000070.355
50000500000018916.04
50000500000070.599
50000515000070.606


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-02-07ANONYMOUSv4_computers2BB8A2BE79F288DD0.143
2018-04-13kkmrkkblmbrbkold2BB8A2BE79F288DD0.143


PRP results:
dateuseridcompidcofactorsres64
2022-06-07ATHec2-PRPCF
8712196993574131372543009
1BC3EA93C91DCD1D


CERT results:
dateuseridcompid
2022-06-07Jason Lynchneptune


P-1 factor-bounds graph:
B1 = 2500000, B2 = 125000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 443545, B2 = 4435450 (P-1 stage 2)
B1 = 443545 (P-1 stage 1)
B1 = 90000, B2 = 1620000 (P-1 stage 2)
B1 = 148870 (P-1 stage 1)
B1 = 119435 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
269
268
267
266
265
263
262
261
260
258
this exponent TF target: 62
TF double-checked to: 67
ECM T-Level=23.63 ~= 62-bit
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290
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Last modified: 2024-03-13T02:15:48+00:00