s2 = 0x352b52b52b52b52b52b52b52b52b52b4e7c1db2bf914fdd54560dc7fb517156e
^repeated pattern^ |<---- 130 bits --->|
It is just an inversion of 0x82, nothing special. If you multiply 0x352b52b52b52b52b52b52b52b52b52b4e7c1db2bf914fdd54560dc7fb517156e by 0x82, you will get 0x1affffffffffffffffffffffffffffffddb0714c547ca8e64d3b2ff8d9f5b8e1dc as a result, which is equal to one, if you apply modulo n=0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141 on that.
can you share more numbers like 0x1affffffffffffffffffffffffffffffddb0714c547ca8e64d3b2ff8d9f5b8e1dc