is 2 2005739 - 1
has 603788 decimal digits
takes 0.132 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.814468.6567%500000150000000.12305.1248%14.937470.2630%1.6063%
PrimeNet2580.019163.7931%80001400000.00142.4802%0.020664.6911%0.8980%
GPU722620.306366.1290%80001100000.00131.2374%0.307666.5482%0.4191%
Difference+5+14.5081+2.5277%+492000+14890000+0.1217+3.8874%+14.6298+3.7149%+3.7149%

Known prime factors (4 factors, 196.4 bits, 0.00979271% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
20057394011479721.9361
1
-111.393e-139.534e-81.940e-7
200573923467146311031.128585
32 × 5 × 13
2008-07-159131.607e-108.788e-71.746e-6
20057397853743420532476970812169.412195781789667860
22 × 5 × 11 × 353 × 2521011971
2021-10-23353252101197196.42513.09524.457
2005739181259176366662387376312373.9404518513534579085
5 × 7876331 × 114736507
2021-11-0678763311147365071,788.81.30601.5282

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
200573994137964612492491653.064
200573931505126802854200186387927992891.348
2005739727117379552162467049932662492995.876
2005739184304945930835495180703869211131100.540
20057394253635611826560450933763797916132105.068
2005739739335420197682041371994776559074216937122.476
200573917063369930494398891151323866300678911939127.004
20057391423563063800810569381421656280300332355511144143.352
20057395710593335612611782051615964313642896937153311916950165.288
200573933406962699725486328268228203732338270128405918529
041
53174.480
200573913401132932373209417063510380647999659151642764565
4958861639
60196.416
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:19:26alpertronManual testing5000001500000012-
skipped known factor: 4011479
skipped known factor: 2346714631
--0.123--5.125%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2008-07-15T07:49:00J FeitsmaManual testing??31.128101.80606e-110.2873.93100e-11


ECM factoring results:

Old Calculation Method

Total ECM effort:3.405 GHz-days
Estimated T-Level:1.900
DigitsB1CurvesCompleteFacMiss
201100038 / 1000.38068.255%
255000038 / 2800.13687.288%

New Calculation Method

Total ECM effort:3.405 GHz-days
Estimated T-Level:1.900
DigitsB1CompleteFacMiss
20110001.26928.110%
25500000.11589.179%
302500000.00799.295%


ECM Summary

B1B2factorcurvesGHz-days
500005000000201.692
50000500000010.085
50000500000020.169
50000675000070.676
50000690000070.683
50000715000010.099


Lucas-Lehmer results:
No L-L results for M2005739


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T20:07:27Oliver KruseGTX-3
4011479
2346714631
6B3D2479FFDE00__no
2017-11-13T10:42:12kkmrkkblmbrbkc4.xlarge
4011479
2346714631
6B3D2479FFDE00__no
2021-10-25T06:38:25_p95holder_TFL16_PRPt11-E_b
4011479
2346714631
785374342053247697081
D37117281E732D__no
2021-10-28T08:06:56ATHec2-PRPCF
4011479
2346714631
785374342053247697081
D37117281E732D42no
2021-11-06T17:45:40MarkSdesktop-i7
4011479
2346714631
785374342053247697081
18125917636666238737631
D37117281E732D42no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
2
220
230
240
250
260
270
280
290
2100
Last modified: 2022-05-17T17:43:44+00:00