I check the pi value using the benchmark software SUPER_PI_MOD-1.5 and i get pi with four millions digits
PI=3.1415926535 8979323846 2643383279 5028841971 6939937510
5820974944 5923078164 0628620899 8628034825 3421170679
8214808651 3282306647 0938446095 5058223172 5359408128
4811174502 8410270193 8521105559 6446229489 5493038196
4428810975 6659334461 2847564823 3786783165 2712019091
the first result is correct
I check the pi value using the benchmark software SUPER_PI_MOD-1.5 and i get pi with four millions digits
PI=3.1415926535 8979323846 2643383279 5028841971 6939937510
5820974944 5923078164 0628620899 8628034825 3421170679
8214808651 3282306647 0938446095 5058223172 5359408128
4811174502 8410270193 8521105559 6446229489 5493038196
4428810975 6659334461 2847564823 3786783165 2712019091
the first result is correct
In the original post, Parambir shows the output for 30 and 300 digits of pi. It's in the code block right after the "Here's the CLI in action:"
The results as shown in the author's work are wrong, and don't agree with your results.