is 2 126949 - 1
has 38216 decimal digits
takes 0.000 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L130393C7DACEAE15double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual267234.061874.6269%10000000020000000000.770511.9304%234.832477.6540%3.0271%
PrimeNet2400.000057.5000%1400260000.00009.5291%0.000061.5499%4.0499%
GPU722440.000061.3636%2200360000.00006.1546%0.000063.7416%2.3779%
Difference+23+234.0618+13.2632%+99997800+1999964000+0.7705+5.7758%+234.8324+13.9124%+13.9124%

Known prime factors (1 factor, 76.8 bits, 0.06048270% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1269491299397178663886060830712476.782511779210022877715
32 × 5 × 71 × 1098401 × 145831337
2008-12-231098401145831337200,7910.03400.0562

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-11-25T00:00:00ANONYMOUSv4_computers100000025000000---0.009--4.409%
2002-06-02T00:00:00ANONYMOUSv4_computers327683276800---0.001--1.373%
2002-07-20T00:00:00ANONYMOUSv4_computers655366553600---0.002--2.000%
2003-02-09T00:00:00ANONYMOUSv4_computers13107213107200---0.003--2.755%
2003-09-29T00:00:00ANONYMOUSv4_computers26214426214400---0.006--3.627%
2017-03-21T00:02:03kkmrkkblmbrbkManual testing100000000200000000012-
skipped known factor: 129939717866388606083071
--0.771--11.930%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-09-22T00:00:00ANONYMOUSv4_computers252253--0.005--
2000-04-19T00:00:00ANONYMOUSv4_computers21254--0.019--
2022-03-07T03:14:13LordJuliusManual testing254255--0.019--
2000-12-31T00:00:00ANONYMOUSv4_computers21256--0.076--
2002-06-02T00:00:00ANONYMOUSv4_computers21257--0.151--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.696 GHz-days
Estimated T-Level:30.172
DigitsB1CurvesCompleteFacMiss
2011000899 / 1008.9900.012%
2550000899 / 2803.2114.010%
30250000641 / 6401.00236.702%
35100000054 / 15660.03496.609%

New Calculation Method

Total ECM effort:11.696 GHz-days
Estimated T-Level:30.172
DigitsB1CompleteFacMiss
201100072.2870.000%
255000010.9860.002%
302500001.24928.674%
3510000000.11589.164%
4030000000.00999.114%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002580.706
250000250000005878.034
1000000100000000542.956


Lucas-Lehmer results:
No L-L results for M126949


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21T21:47:11Oliver KruseOllaptop
129939717866388606083071
6D68E385697195__no
2017-09-22T10:01:27Oliver KruseManual testing
129939717866388606083071
6D68E385697195__no
2017-10-13T19:02:25kkmrkkblmbrbkManual testing
129939717866388606083071
6D68E385697195__no
2020-04-17T15:36:05Oliver KruseAddPrpType5
129939717866388606083071
06BF3C1949742A__no


P-1 factor-bounds graph:
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
B1 = 1000000, B2 = 25000000 (P-1 stage 2)
B1 = 262144, B2 = 26214400 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 65536, B2 = 6553600 (P-1 stage 2)
B1 = 262144 (P-1 stage 1)
B1 = 32768, B2 = 3276800 (P-1 stage 2)
B1 = 131072 (P-1 stage 1)
B1 = 65536 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
103
104
105
106
107
108
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
257
256
255
254
253
250
260
270
280
290
2100
Last modified: 2022-03-07T03:14:13+00:00