GMP-ECM 7.0.5 [configured with GMP 6.2.1, --enable-asm-redc] [ECM]
Input number is (10^284+7)/67/2179/7406682991/20222368763/4021551203247712347088840648953189590653 (220 digits)
Using B1=110000000, B2=776278396540, polynomial Dickson(30), sigma=1:499898617
Step 1 took 217124ms
Step 2 took 71549ms
********** Factor found in step 2: 1076832708090616849649990722488050156966297971097408605717
Found prime factor of 58 digits: 1076832708090616849649990722488050156966297971097408605717
Prime cofactor ((10^284+7)/67/2179/7406682991/20222368763/4021551203247712347088840648953189590653)/1076832708090616849649990722488050156966297971097408605717 has 163 digits