Revert "judge_prime = function(x){"

This reverts commit 97978879019437b3c5e74c895334c4300631d679.
Revert "Revert "judge_prime = function(x){""

This reverts commit 274a7eb27cbbf52b342f5d6ea2531a5a2c78fd8b.
Revert "Revert "Revert "judge_prime = function(x){"""

This reverts commit 0f53aab8ee404d6d2bb7565360b282ec5bab49ce.