is 2 101203 - 1
has 30466 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-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual267293.607174.6269%100000000065504093955301,153.007425.4570%1,446.614581.0861%
Target2440.000061.3636%1200180000.00004.1584%0.000062.9703%
Difference+23+293.6071+13.2632%+999998800+6550409377530+1,153.0074+21.2986%+1,446.6145+18.1158%

Known prime factors (1 factor, 20.6 bits, 0.02038170% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1012031619249720.6278
23
-881.383e-122.578e-85.246e-8

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-11-02kkmrkkblmbrbkManual testing100000000200000000012-
skipped known factor: 1619249
--0.656--11.734%
2021-12-17Seth_TrManual testing10000000006550409395530-
skipped known factor: 1619249
--1,153--25.457%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2018-10-25J.R. AllenManual testing252257--0.184--
2022-04-13LordJuliusManual testing2125720.62771.38268e-120.0002.94963e-12
2018-11-02J.R. AllenManual testing257258--0.190--
2022-04-13LordJuliusManual testing257258--0.190--
2018-11-02J.R. AllenManual testing258259--0.379--
2022-04-13LordJuliusManual testing258259--0.379--
2018-11-02J.R. AllenManual testing259260--0.759--
2022-04-13LordJuliusManual testing259260--0.759--
2022-04-13LordJuliusManual testing260261--1.518--
2022-04-13LordJuliusManual testing261262--3.035--
2022-12-08LordJuliusManual testing262263--9.70--
2022-12-08LordJuliusManual testing263264--19.40--
2022-12-08LordJuliusManual testing264265--36.92--


ECM factoring results:
Total ECM effort:12.597 GHz-days
Estimated T-Level:30.756
DigitsB1CompleteFacMiss
201100082.4900.000%
255000012.9390.000%
302500001.54521.330%
3510000000.15185.963%
4030000000.01398.746%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002810.652
250000250000005856.791
10000001000000001115.154


Lucas-Lehmer results:
No L-L results for M101203


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-21Oliver KruseDoppelherz
1619249
0841F0B9466F42__no
2017-09-21Oliver KruseManual testing
1619249
0841F0B9466F42__no
2017-09-22Oliver KruseManual testing
1619249
0841F0B9466F42__no
2017-11-06kkmrkkblmbrbkc4.xlarge
1619249
0841F0B9466F42__no
2020-04-17Oliver KruseAddPrpType5
1619249
20514E97A60978__no
2022-04-15LordJuliusWhiteBox
1619249
20514E97A6097820no


P-1 factor-bounds graph:
B1 = 1000000000, B2 = 6550409395530 (P-1 stage 2)
B1 = 1000000000 (P-1 stage 1)
B1 = 100000000, B2 = 2000000000 (P-1 stage 2)
B1 = 100000000 (P-1 stage 1)
100
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105
106
107
108
109
100
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102
103
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109
1010
1011
1012
1013
TF factor-bounds graph:
265
264
263
262
261
260
259
258
257
this exponent TF target: 44
TF double-checked to: 67.7
ECM T-Level=30.76 ~= 86-bit
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Last modified: 2023-03-23T17:39:31+00:00