is 2 495071 - 1
has 149032 decimal digits
takes 0.006 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26760.019571.6418 %131072131072000.01433.3556 %60.033872.5934 %
Target2440.000056.8182 %900014000000.001414.3388 %0.001563.0099 %
Difference+23+60.0195+14.8236 %+122072+11707200+0.0129-10.9833 %+60.0324+9.5834 %

Known prime factors (1 factor, 61.4 bits, 0.01239999% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
49507130189518426362492071961.3893049008973093
233 × 13085875421
2007-12-30233130858754210.620512.17622.741

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2001-12-08ANONYMOUSv4_computers500001000000--0.00219.434%
2002-06-29ANONYMOUSv4_computers32768327680012--0.00422.099%
2002-09-22ANONYMOUSv4_computers65536655360012--0.00724.744%
2003-05-04ANONYMOUSv4_computers1310721310720030--0.01427.336%


Trial Factoring results:
5758596061626364656667
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-05-05ANONYMOUSv4_computers212540.005
2022-03-07LordJuliusManual testing254255
2001-04-01ANONYMOUSv4_computers212560.019
2002-01-15ANONYMOUSv4_computers212570.039
2003-12-23ANONYMOUSv4_computers212580.078


ECM factoring results:
Total ECM effort:12.963 GHz-days
Estimated T-Level:26.434
DigitsB1CompleteFacMiss
201100023.8600.000%
25500003.0254.858%
302500000.28775.066%
3510000000.02297.833%
4030000000.00199.860%


ECM Summary

B1B2factorcurvesGHz-days
10.011
5000050000002803.624
250000250000001449.328


Lucas-Lehmer results:
No L-L results for M495071


PRP results:
dateuseridcompidcofactorsres64
2017-09-27Oliver KruseDoppelherz
3018951842636249207
A6BFA0525ABEA652
2017-11-03kkmrkkblmbrbkc4.xlarge
3018951842636249207
A6BFA0525ABEA652
2020-04-18Oliver KruseAddPrpType5
3018951842636249207
C183588CEA5AA5D2


CERT results:
No CERT results for M495071


P-1 factor-bounds graph:
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 50000, B2 = 1000000 (P-1 stage 2)
B1 = 65536 (P-1 stage 1)
B1 = 50000 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
258
257
256
255
254
this exponent TF target: 44
TF double-checked to: 67
ECM T-Level=26.43 ~= 71-bit
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Last modified: 2024-02-29T14:28:04+00:00