is 2 144889 - 1
has 43616 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-L38973E1ED6901D7Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual267205.080673.1343%10000000020000000000.942712.0460%206.023276.3706%3.2362%
PrimeNet2400.000055.0000%1600320000.000010.4529%0.000059.7038%4.7038%
GPU722440.000059.0909%2600500000.00007.0941%0.000061.9930%2.9021%
Difference+23+205.0805+14.0434%+99997400+1999950000+0.9427+4.9520%+206.0232+14.3775%+14.3775%

Known prime factors (1 factor, 88.0 bits, 0.06076963% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1448893200672208717909318953913672788.0491104525605366145573147
32 × 397 × 82193 × 114451 × 32861573		2009-01-0411445132861573699,259,7320.00880.0155

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-11-25T00:00:00ANONYMOUSv4_computers100000025000000---0.011--4.478%
2002-06-02T00:00:00ANONYMOUSv4_computers327683276800---0.001--1.406%
2002-07-20T00:00:00ANONYMOUSv4_computers655366553600---0.002--2.044%
2003-02-09T00:00:00ANONYMOUSv4_computers13107213107200---0.004--2.809%
2003-09-29T00:00:00ANONYMOUSv4_computers26214426214400---0.008--3.691%
2017-04-16T18:48:16kkmrkkblmbrbkManual testing100000000200000000012-
skipped known factor: 320067220871790931895391367
--0.943--12.046%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-10-15T00:00:00ANONYMOUSv4_computers252253--0.004--
2000-04-27T00:00:00ANONYMOUSv4_computers21254--0.017--
2022-03-07T03:24:41LordJuliusManual testing254255--0.017--
2001-01-08T00:00:00ANONYMOUSv4_computers21256--0.066--
2002-07-06T00:00:00ANONYMOUSv4_computers21257--0.133--
2022-03-07T03:24:41LordJuliusManual testing257258--0.133--
2008-12-31T19:50:00Sturle Sundeginjtje.ifi258259--0.265--


ECM factoring results:

Old Calculation Method

Total ECM effort:12.558 GHz-days
Estimated T-Level:29.867
DigitsB1CurvesCompleteFacMiss
2011000889 / 1008.8900.013%
2550000889 / 2803.1754.156%
30250000623 / 6400.97337.749%
35100000024 / 15660.01598.479%

New Calculation Method

Total ECM effort:12.558 GHz-days
Estimated T-Level:29.867
DigitsB1CompleteFacMiss
201100068.6850.000%
255000010.1830.004%
302500001.11532.792%
3510000000.09790.746%
4030000000.00799.298%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
5000050000002660.893
2500002500000059910.05
1000000100000000241.611


Lucas-Lehmer results:
No L-L results for M144889


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21T22:58:01Oliver KruseDoppelherz
320067220871790931895391367
DB01F60C8EA976__no
2017-09-22T10:01:32Oliver KruseManual testing
320067220871790931895391367
DB01F60C8EA976__no
2017-10-13T18:18:21Oliver KruseThreadripperDB01F60C8EA976__no
2017-11-06T12:54:38kkmrkkblmbrbkc4.xlarge
320067220871790931895391367
DB01F60C8EA976__no
2020-04-17T15:46:49Oliver KruseAddPrpType5
320067220871790931895391367
954308DB36DFDD__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
259
258
257
256
255
254
253
250
260
270
280
290
2100
Last modified: 2022-03-07T03:24:41+00:00