is 2 505877 - 1
has 152285 decimal digits
takes 0.007 GHz-days to do one PRP test
Last-known PrimeNet details:
-unknown- L-L tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26758.737471.6418%100000008100000001.133110.6967%59.870674.6752%22.1752%
PrimeNet2400.000052.5000%50001700000.000319.1270%0.000361.5853%9.0853%
GPU722440.000056.8182%90002800000.000514.3775%0.000563.0266%6.2085%
Difference+23+58.7374+14.8236%+9991000+809720000+1.1326-3.6808%+59.8701+11.6485%+11.6485%

Known prime factors (2 factors, 148.5 bits, 0.02935129% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
505877112788158649744918792063.29011147784802407
32 × 11 × 353 × 1783 × 178907
-17831789074.79050.00020.0004
505877441671025137150825254974172685.19143653993474416787604
22 × 421 × 17417 × 1488361886393
2021-05-1917417148836188639317,514,4311,714.73,202.6

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
50587749815261654164443308322528539153533130197654345148.481
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:40:43alpertronManual testing15000005000000012---0.088--6.107%
2021-05-19T12:13:19gLaussmanu210000000810000000---1.133--10.697%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-19T12:57:24gLaussmanu2500000036500000027P+12685.1910.458


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-03-01T00:00:00ANONYMOUSv4_computers253254--0.002--


ECM factoring results:
Total ECM effort:16.080 GHz-days
Estimated T-Level:26.125
DigitsB1CurvesCompleteFacMiss
2011000425 / 1004.2501.396%
2550000425 / 2801.51821.859%
30250000144 / 6400.22579.838%

ECM Summary

B1B2factorcurvesGHz-days
5000050000002814.514
2500002500000014411.57


Lucas-Lehmer results:
Exponent "505877" not found


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-27T09:42:47Oliver KruseGTX-3
11278815864974491879
0812D13FEEBEAC__no
2017-09-28T09:42:26Oliver KruseManual testing
11278815864974491879
0812D13FEEBEAC__no
2017-11-09T04:39:31kkmrkkblmbrbkc4.large
11278815864974491879
0812D13FEEBEAC__no
2020-04-19T00:19:10Oliver KruseAddPrpType5
11278815864974491879
5158FBB4F181EE__no
2021-05-19T13:48:14mnd975211backdoor
11278815864974491879
44167102513715082525497417
5158FBB4F181EE24no
2021-05-19T14:16:13gLaussmanu
11278815864974491879
44167102513715082525497417
5158FBB4F181EE24no
2021-05-21T02:18:32kutensarcturus
11278815864974491879
44167102513715082525497417
5158FBB4F181EE24no


P-1 factor-bounds graph:
B1 = 10000000, B2 = 810000000 (stage 2)
B1 = 10000000 (stage 1)
B1 = 1500000, B2 = 50000000 (stage 2)
B1 = 1500000 (stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
254
250
260
270
280
290
2100
Last modified: 2021-05-21T02:18:32+00:00