$rsa = new Crypt_RSA();
$rsa->modulus = $modulus;
$rsa->publicExponent = $exponent;
$rsa->exponents = array(1=> $dp, $dq);
$rsa->coefficients = array(2 => $inverseq);
$rsa->primes = array(1 => $p, $q);
$rsa->k = strlen($rsa->modulus->toBytes());

echo $rsa;