is 2 250073 - 1
has 75280 decimal digits
takes 0.001 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
Actualunknown30000000101202470268904,486.311472.9920%4,486.311472.9920%72.9920%
PrimeNet2400.000055.0000%2600700000.000114.2062%0.000161.3928%6.3928%
GPU722440.000059.0909%45001100000.000110.1607%0.000163.2475%4.1566%
Difference-440.0000-59.0909%+29995500+10120246916890+4,486.3113+62.8313%+4,486.3113+9.7445%+9.7445%

Known prime factors (2 factors, 122.6 bits, 0.04900696% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
25007321861381671031.0264371
3 × 31 × 47
-31472.226e-92.593e-75.133e-7
25007335686764247119240417056409372891.5277135269350773422244116
22 × 3 × 67 × 1723 × 2711 × 1899938434193
2021-02-14271118999384341932.490e+9842.201,573.0

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
250073780161973773583912757760143157334247937122.553
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2021-05-27T08:02:39gLaussManual testing150000001290000000-
skipped known factor: 2186138167
--0.687--41.497%
2021-08-16T18:24:40Oliver KruseOllaptop30000000300000000024-
skipped known factor: 2186138167
--1.561--44.019%
2022-04-19T07:55:00Oliver KruseThreadripper-PC3000000010120247026890-
skipped known factor: 2186138167
skipped known factor: 3568676424711924041705640937
--4,486--63.132%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2021-05-27T08:02:39gLaussManual testing750000059250000027--0.347


Trial Factoring results:
No TF results for M250073


ECM factoring results:

Old Calculation Method

Total ECM effort:8.983 GHz-days
Estimated T-Level:26.891
DigitsB1CurvesCompleteFacMiss
2011000523 / 1005.2300.521%
2550000523 / 2801.86815.394%
30250000242 / 6400.37868.494%

New Calculation Method

Total ECM effort:8.983 GHz-days
Estimated T-Level:26.891
DigitsB1CompleteFacMiss
201100029.2310.000%
25500003.7462.362%
302500000.36669.319%
3510000000.02997.181%
4030000000.00299.816%


ECM Summary

B1B2factorcurvesGHz-days
5000050000002811.680
250000250000002256.726
2500002500000030.090
2500003625000070.241
2500003850000070.247


Lucas-Lehmer results:
No L-L results for M250073


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-22T07:04:49Oliver KruseOllaptop
2186138167
262B96A8C408C1__no
2017-09-22T10:06:11Oliver KruseManual testing
2186138167
262B96A8C408C1__no
2017-10-12T16:37:14Oliver KruseGTX-2262B96A8C408C1__no
2017-11-06T16:54:32kkmrkkblmbrbkc4.xlarge
2186138167
262B96A8C408C1__no
2020-04-17T20:11:42Oliver KruseAddPrpType5
2186138167
3117951D121FEC__no
2021-02-15T07:33:27MarkSdesktop-i7
2186138167
3568676424711924041705640937
3117951D121FEC04no


P-1 factor-bounds graph:
B1 = 30000000, B2 = 10120247026890 (P-1 stage 2)
B1 = 30000000, B2 = 3000000000 (P-1 stage 2)
B1 = 15000000, B2 = 1290000000 (P-1 stage 2)
B1 = 30000000 (P-1 stage 1)
B1 = 15000000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-05-20T07:01:37+00:00