this is the current estimate and assurance that ECC is currently impossible to crack.

2022

https://www.schneier.com/blog/archives/2022/02/breaking-245-bit-elliptic-curve-encryption-with-a-quantum-computer.html

this is the paper that describes on page 12, Section 3.4.2, how multiplexed processing negates the requirement for physical large number of qubits.

https://eprint.iacr.org/2025/017.pdf

the Itoh-Tsujii method is not the primary means. Use of another number system is a lot faster.

https://galileo-unbound.blog/2024/10/22/counting-by-the-waters-of-babylon-the-secrets-of-the-babylonian-60-by-60-multiplication-system/

I am no hater of whatever. The intent is simply to present what is the writing on the wall.