is 2 2036423 - 1
has 613025 decimal digits
takes 0.134 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as ecm on 2022-08-06, 0.0% done, ETC 2022-08-09
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26714.591268.6567%500000150000000.12305.1342%14.714270.2659%1.6092%
PrimeNet2580.018963.7931%90001600000.00162.6623%0.020564.7570%0.9639%
GPU722620.301766.1290%90001200000.00141.3285%0.303166.5790%0.4500%
Difference+5+14.2895+2.5277%+491000+14880000+0.1216+3.8057%+14.4111+3.6869%+3.6869%

Known prime factors (2 factors, 119.9 bits, 0.00588592% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2036423436486905831135.34510717
7 × 1531
-715312.966e-98.583e-61.489e-5
2036423276809485200269306786344812684.5176796463337928055880
23 × 32 × 5 × 11 × 4597 × 373347535499
2021-09-1945973733475354992,473,5821,939.33,622.0

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
2036423120823715699460727601890667012379242337119.862
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-17T19:19:48alpertronManual testing5000001500000012-
skipped known factor: 43648690583
--0.123--5.134%


Trial Factoring results:
No TF results for M2036423


ECM factoring results:

Old Calculation Method

Total ECM effort:3.245 GHz-days
Estimated T-Level:1.800
DigitsB1CurvesCompleteFacMiss
201100036 / 1000.36069.641%
255000036 / 2800.12987.915%

New Calculation Method

Total ECM effort:3.245 GHz-days
Estimated T-Level:1.800
DigitsB1CompleteFacMiss
20110001.43623.790%
25500000.13387.566%
302500000.00899.163%


ECM Summary

B1B2factorcurvesGHz-days
500005000000201.695
50000646446470.664
50000690000020.196
50000700000070.690


Lucas-Lehmer results:
No L-L results for M2036423


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-06T04:42:48Oliver KruseGTX-3
43648690583
C88FA61890E509__no
2017-11-14T15:22:16ATHec2-1xf
43648690583
C88FA61890E509__no
2021-09-19T17:13:54Ahmed AzhadAzhadPC1
43648690583
27680948520026930678634481
FC659ABE563C4A32no


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
100
101
102
103
104
105
106
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109
1010
1011
1012
TF factor-bounds graph:
267
230
240
250
260
270
280
290
2100
Last modified: 2022-08-09T03:27:02+00:00