Revision as of 02:53, 15 January 2026

X -1 mod n

The multiplicative inverse of the integer x modulo the positive integer n. This quantity is defined if and only if x is relatively prime to n. For the purposes of this Recommendation, y = x-1 mod n is the unique integer satisfying the following two conditions:

Source: NIST SP 800-56B Rev. 2 | Category:

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