@CanIgnoreReturnValue
    public Builder setPrimes(SecretBigInteger p, SecretBigInteger q) {
      this.p = Optional.of(p);
      this.q = Optional.of(q);
      return this;
    }
Sets the prime factors p and q.

<p>See https://datatracker.ietf.org/doc/html/rfc7518#section-6.3.2.2.

<p>This is required.
java_src/src/main/java/com/google/crypto/tink/jwt/JwtRsaSsaPssPrivateKey.java