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Factorization of N given e and d based on trial and error. [Divide k by powers of 2 satisfying x to be greater than 1]. Full explanation here: https://crypto.stackexchange.com/questions/62482/algorithm-to-factorize-n-given-n-e-d/62487#62487
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import random | |
from math import gcd | |
n = 113138904645172037883970365829067951997230612719077573521906183509830180342554841790268134999423971247602095979484887092205889453631416247856139838680189062511282674134361726455828113825651055263796576482555849771303361415911103661873954509376979834006775895197929252775133737380642752081153063469135950168223 | |
e = 65537 | |
d = 87345713405055532428664184040885638635456003191089749453199952101307167014234779974982171268609415280584641472420424299514002514548043646741981648196634644960356958819956637431278502574332925957523028825580469419959164626563649612912919564472132340496010962167627957743115660323378023656051813802028938198977 | |
k = e*d - 1 | |
g = random.randint(2, n - 1) | |
t = k | |
while(t % 2 == 0): | |
t = t // 2 | |
x = pow(g, t, n) | |
y = gcd(x - 1, n) | |
while(x > 1 and y > 1): | |
p = y | |
q = n // y | |
print(p, q) | |
break |
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