@abakcus

@abakcus 3.1416325445 pi is 3.14159265359 so 3.146.. that's not much...

@abakcus Great short paper. Easy to memorize.

@abakcus

@abakcus

@abakcus Nice

@abakcus ~3.141632544503618 my default is 3.141592

@abakcus #J %:7+%:6+%:5 3.14163

@abakcus π approx = (71 + 73 + 79 + 83)^(1/5) = 3.1415522358 Thus it's the 5th root of summation of four consecutive primes 71,73,79 & 83.

@abakcus what about (9801/4412)*sqr(2) ?

@abakcus 9801/(1103*√8) from the genius Ramanujan

@abakcus 104348/33215

@abakcus Here are even more:

@abakcus An even nicer approximation of e (8 digits!) is given by

@abakcus The equation shows that the sixth-degree polynomial f(x) = ((x**2 - 7)**2 - 6)**2 - 5 has a root that is close to pi:

@abakcus 3.1416325445036178404721379451427654132131246430210281608670469980 355/113 = 3.1415929203539823008849557522124

@abakcus @pshufb How about just.... 4 ?

@abakcus It's cute.

@abakcus I really like 355/113, it's the only rational approximation that gives you more digits of accuracy (7) than it takes to write it (6), and it has this neat mnemonic