is 2 175753 - 1
has 52907 decimal digits
takes 0.001 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L29D45348F941C65Adouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual267169.066373.1343%10000000020000000001.360712.2161%170.427176.4163%3.2819%
PrimeNet2400.000055.0000%1900400000.000011.6156%0.000060.2270%5.2270%
GPU722440.000059.0909%3200650000.00008.1181%0.000162.4119%3.3210%
Difference+23+169.0663+14.0434%+99996800+1999935000+1.3607+4.0980%+170.4270+14.0043%+14.0043%

Known prime factors (1 factor, 77.5 bits, 0.04408702% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1757532113903040899917735281692477.484601384625269531028
22 × 139 × 1081627023866063
2009-06-101391081627023866063226,476394,013735,906

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-05-06T00:00:00ANONYMOUSv4_computers10000010000000---0.004--2.571%
2002-06-02T00:00:00ANONYMOUSv4_computers327683276800---0.001--1.457%
2003-02-16T00:00:00ANONYMOUSv4_computers13107213107200---0.006--2.890%
2003-10-08T00:00:00ANONYMOUSv4_computers26214426214400---0.011--3.787%
2009-01-27T05:11:00axnManual testing5000000200000000---0.104--7.617%
2017-04-23T22:45:56kkmrkkblmbrbkManual testing100000000200000000012---1.361--12.216%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-11-10T00:00:00ANONYMOUSv4_computers252253--0.003--
2000-04-27T00:00:00ANONYMOUSv4_computers21254--0.014--
2022-03-07T04:17:32LordJuliusManual testing254255--0.014--
2001-01-21T00:00:00ANONYMOUSv4_computers21256--0.055--
2002-06-09T00:00:00ANONYMOUSv4_computers21257--0.109--
2022-03-07T04:17:32LordJuliusManual testing257258--0.109--
2008-12-30T10:35:00Sturle Sundeinteravia.ifi258259--0.218--
2009-01-24T18:36:00Sturle Sundeaalto.ifi259260--0.437--


ECM factoring results:

Old Calculation Method

Total ECM effort:15.257 GHz-days
Estimated T-Level:29.469
DigitsB1CurvesCompleteFacMiss
2011000848 / 1008.4800.020%
2550000848 / 2803.0294.812%
30250000572 / 6400.89440.883%

New Calculation Method

Total ECM effort:15.257 GHz-days
Estimated T-Level:29.469
DigitsB1CompleteFacMiss
201100062.6150.000%
25500009.0390.012%
302500000.95238.615%
3510000000.07892.474%
4030000000.00599.478%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002761.343
2500002500000057213.91


Lucas-Lehmer results:
No L-L results for M175753


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T00:25:25Oliver KruseOllaptop
211390304089991773528169
8BBB4F326DE024__no
2017-09-22T10:04:34Oliver KruseManual testing
211390304089991773528169
8BBB4F326DE024__no
2017-10-12T02:05:03kkmrkkblmbrbkc4.xlarge8BBB4F326DE024__no
2020-04-17T17:58:33Oliver KruseAddPrpType5
211390304089991773528169
13801B5EF278E8__no


P-1 factor-bounds graph:
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
B1 = 5000000, B2 = 200000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 262144, B2 = 26214400 (P-1 stage 2)
B1 = 131072, B2 = 13107200 (P-1 stage 2)
B1 = 100000, B2 = 10000000 (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 = 100000 (P-1 stage 1)
B1 = 32768 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-03-07T04:17:32+00:00