http://benji3up2kxewkqfcq7buxk2xd6zwy3zggnurkrm3l4cvwy2iipvyyad.onion/mirrors/gmpdoc/C_002b_002b-Formatted-Output.html
Function: ostream& operator<< (ostream& stream , const mpz_t op ) ¶ Print op to stream , using its ios formatting settings. ios::width is reset to 0 after output, the same as the standard ostream operator<< routines do. In hex or octal, op is printed as a signed number, the same as for
decimal.