is 2 7660067 - 1
has 2305910 decimal digits
takes 1.753 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L56FFC3139D33C6E6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2673.879165.6716 %9500017575000.06163.0956 %3.940666.7343 %
Target2673.879165.6716 %5000055000000.11512.4457 %3.994266.5112 %
Difference---+45000-3742500-0.0535+0.6499%-0.0535+0.2231 %

Known prime factors (1 factor, 89.2 bits, 0.00116476% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
76600677214537663850632563431696472789.22147091870500941000669
11 × 19 × 29 × 1873 × 4148240045473
2018-05-191873414824004547316,366,92974,987140,054

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-06-02ANONYMOUSv4_computers40000400000--0.0201.780%
2012-07-31NesowaWork9500017575006--0.0593.096%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-08-02ANONYMOUSv4_computers212630.128
2013-10-11NesowaManual testing2632640.256
2013-12-13David CampeauManual testing2642650.488
2015-06-12VictordeHollanderManual testing2652660.976
2016-09-17Gordon SpenceManual testing2662671.951


ECM factoring results:
Total ECM effort:1.326 GHz-days
Estimated T-Level:0.769
DigitsB1CompleteFacMiss
20110000.15485.740%
25500000.01498.587%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.995
50000500000010.332


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-07-27curtiscv4_computers56FFC3139D33C6E61.753
2002-08-03ANONYMOUSv4_computers56FFC3139D33C6E61.753


PRP results:
dateuseridcompidcofactorsres64
2018-05-24Oliver KruseGTX-1
721453766385063256343169647
5D3C8BBDC92A97ED
2019-08-14marssystemssystem11
721453766385063256343169647
5D3C8BBDC92A97ED


CERT results:
No CERT results for M7660067


P-1 factor-bounds graph:
B1 = 95000, B2 = 1757500 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 40000, B2 = 400000 (P-1 stage 2)
B1 = 40000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
266
265
264
263
this exponent TF target: 67
TF double-checked to: 67
ECM T-Level=0.77 ~= -14-bit
250
260
270
280
290
JSON version of this page
Last modified: 2024-02-09T03:30:02+00:00