is 2 1382527 - 1
has 416183 decimal digits
takes 0.053 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L92DA45836AB6DB90double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26721.492568.6567 %5000010000000.00561.7980 %21.498169.2203 %
Target2600.111165.0000 %55003250000.00131.1713 %0.112465.4100 %
Difference+7+21.3814+3.6567 %+44500+675000+0.0044+0.6267%+21.3857+3.8103 %

Known prime factors (2 factors, 140.6 bits, 0.01017288% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
13825271156755825319207414312166.64941834836691045
5 × 19 × 1979 × 222519809
2007-12-31197922251980910.6820.67131.2536
1382527188135226173401214282172373.9946804034430192004
22 × 3 × 11717773 × 48388279
2018-11-0911717773483882791,383.60.75931.3203

1 Composite Factors:
P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2000-11-15ANONYMOUSv4_computers500001000000--0.0064.293%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2001-11-03ANONYMOUSv4_computers212570.014
2003-07-06ANONYMOUSv4_computers212580.028


ECM factoring results:
Total ECM effort:29.548 GHz-days
Estimated T-Level:25.703
DigitsB1CompleteFacMiss
201100014.6150.000%
25500001.64719.258%
302500000.14186.886%
3510000000.01099.022%


ECM Summary

B1B2factorcurvesGHz-days
10.042
50000500000021811.93
500005000000321.758
250000350000005015.82


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-06-03ANONYMOUSv4_computers92DA45836AB6DB900.053


PRP results:
dateuseridcompidcofactorsres64
2017-10-01Oliver KruseGTX-0
115675582531920741431
A7D50C8BD02BFB86
2017-10-24kkmrkkblmbrbkold
115675582531920741431
A7D50C8BD02BFB86
2018-11-09rucio
115675582531920741431
18813522617340121428217
7024586F78B3120A
2018-11-09Chang Chia-Tcheex03
115675582531920741431
18813522617340121428217
7024586F78B3120A


CERT results:
No CERT results for M1382527


P-1 factor-bounds graph:
B1 = 50000, B2 = 1000000 (P-1 stage 2)
B1 = 50000 (P-1 stage 1)
102
103
104
105
106
107
108
102
103
104
105
106
107
108
109
TF factor-bounds graph:
258
257
this exponent TF target: 60
TF double-checked to: 67
ECM T-Level=25.7 ~= 69-bit
250
260
270
280
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Last modified: 2024-02-29T14:28:04+00:00