The P-code is also a PRN; however, each satellite's P-code PRN code is 6.1871 × 1012 bits long (6,187,100,000,000 bits, ~720.213
The details of the W-code are kept secret, but it is known that it is applied to the P-code at approximately 500 kHz,[REF] which is a slower rate than that of the P-code itself by a factor of approximately 20.