is 2 7666069 - 1
has 2307717 decimal digits
takes 1.754 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L156F323DCCABEA5Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26915.573466.6667 %1337698321047421.00006.3073 %16.573468.7691 %
Target2673.876065.6716 %5000055000000.11512.4460 %3.991166.5113 %
Difference+2+11.6974+0.9950 %+1287698+26604742+0.8849+3.8613%+12.5823+2.2578 %

Known prime factors (1 factor, 84.7 bits, 0.00110513% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
7666069318534122873490378720769132684.7202077558412750331224
23 × 7 × 41 × 5869 × 6221 × 24783181
2020-05-25622124783181675,2270.45000.8367

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-03-24ANONYMOUSv4_computers35000271250--0.0161.537%
2012-08-01NesowaWork9500017575006--0.0593.096%
2020-05-25GdSManual testing1337698321047421222684.7200.9537.508%


Trial Factoring results:
57585960616263646566676869
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
1998-12-13ANONYMOUSv4_computers212620.040
1999-07-12ANONYMOUSv4_computers212630.128
2013-10-11NesowaManual testing2632640.256
2013-12-07David CampeauManual testing2642650.487
2015-06-12VictordeHollanderManual testing2652660.975
2016-09-19Gordon SpenceManual testing2662671.950
2018-07-31ramgeisManual testing2672683.899
2020-03-20TJAOIManual testing2682697.798


ECM factoring results:
Total ECM effort:1.989 GHz-days
Estimated T-Level:1.154
DigitsB1CompleteFacMiss
20110000.23179.392%
25500000.02197.887%
302500000.00199.865%


ECM Summary

B1B2factorcurvesGHz-days
50000500000061.989


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-22ANONYMOUSv4_computers156F323DCCABEA5F1.754
2002-05-05ANONYMOUSv4_computers156F323DCCABEA5F1.754


PRP results:
dateuseridcompidcofactorsres64
2020-05-26Klaus Nordmannno1
31853412287349037872076913
EB91B1B4886EB4D7
2020-05-27marssystemssystem03
31853412287349037872076913
EB91B1B4886EB4D7


CERT results:
No CERT results for M7666069


P-1 factor-bounds graph:
B1 = 1337698, B2 = 32104742 (P-1 stage 2)
B1 = 1337698 (P-1 stage 1)
B1 = 95000, B2 = 1757500 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 35000, B2 = 271250 (P-1 stage 2)
B1 = 35000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
TF factor-bounds graph:
269
268
267
266
265
264
263
262
this exponent TF target: 67
TF double-checked to: 67
ECM T-Level=1.15 ~= -13-bit
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Last modified: 2024-03-13T02:15:48+00:00