Collatz Conjecture/Progress
Collatz Conjecture: Progress
As of $7$th March $2017$, all numbers up to $2^{60}$ had been tested, and all were found to end in $1$.
According to 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.), at that point all numbers had been tested up to $10^20$.
Sources
- 2021: Richard Earl and James Nicholson: The Concise Oxford Dictionary of Mathematics (6th ed.) ... (previous) ... (next): Collatz conjecture