is 2 1087487 - 1
has 327367 decimal digits
takes 0.032 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L5EFF7A37958F547Cdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26727.323568.6567 %1000000300000000.11095.8410 %27.434370.4875 %
Target2600.141265.0000 %45001000000.00040.6537 %0.141765.2288 %
Difference+7+27.1822+3.6567 %+995500+29900000+0.1105+5.1873%+27.2927+5.2587 %

Known prime factors (1 factor, 70.3 bits, 0.00646093% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
108748714155136814333109425432270.262650818667916633
3 × 53 × 1237 × 3308972651
2008-03-2112373308972651219.737.747914.471

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-10-22ANONYMOUSv4_computers500001000000--0.0044.142%
2004-04-29ANONYMOUSv4_computers10000030000006--0.0115.791%
2004-06-21ANONYMOUSv4_computers10000003000000012--0.11110.720%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-24ANONYMOUSv4_computers212570.018


ECM factoring results:
Total ECM effort:17.587 GHz-days
Estimated T-Level:25.655
DigitsB1CompleteFacMiss
201100014.7310.000%
25500001.61319.937%
302500000.13187.717%
3510000000.00999.131%


ECM Summary

B1B2factorcurvesGHz-days
10.056
5000050000002799.80
25000025000000447.732


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-12-07ANONYMOUSv4_computers5EFF7A37958F547C0.032


PRP results:
dateuseridcompidcofactorsres64
2017-09-29Oliver KruseGTX-3
1415513681433310942543
EE365599067A9039
2017-10-16Oliver KruseThreadripper-PC
1415513681433310942543
EE365599067A9039
2018-01-03ATHec2-1xh
1415513681433310942543
EE365599067A9039


CERT results:
No CERT results for M1087487


P-1 factor-bounds graph:
B1 = 1000000, B2 = 30000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 100000, B2 = 3000000 (P-1 stage 2)
B1 = 50000, B2 = 1000000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.66 ~= 69-bit
250
260
270
280
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Last modified: 2024-03-03T02:29:32+00:00