16 lines
458 B
Text
16 lines
458 B
Text
include mpfr.e
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atom t0 = time()
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mpz z = mpz_init()
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for i=1 to 17 do
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integer pi = get_prime(i)
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mpz_ui_pow_ui(z,2,pi)
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mpz_sub_ui(z,z,1)
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string zs = mpz_get_str(z),
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fs = mpz_factorstring(mpz_prime_factors(z,20000))
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if fs!=zs then zs &= " = "&fs end if
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printf(1,"2^%d-1 = %s\n",{pi,zs})
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end for
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string s = "600851475143"
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mpz_set_str(z,s)
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printf(1,"%s = %s\n",{s,mpz_factorstring(mpz_prime_factors(z,500))})
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?elapsed(time()-t0)
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