# 26 digits of PI= 3.14159 26535 89793 23846 26433 # 32-bit PI=acos(-1)= 3.1415927 # p N=2**p kind PI (seq) time (seq) PI (par) time (par) 1 2 4 3.162353038787841796875 0.164739E-04 3.162353038787841796875 0.167790E-03 2 4 4 3.146800518035888671875 0.355905E-05 3.146800518035888671875 0.565709E-05 3 8 4 3.142894983291625976563 0.376999E-05 3.142894744873046875000 0.493182E-05 4 16 4 3.141918420791625976563 0.326382E-05 3.141918420791625976563 0.461400E-05 5 32 4 3.141674757003784179688 0.338699E-05 3.141674041748046875000 0.504986E-05 6 64 4 3.141612529754638671875 0.376697E-05 3.141613006591796875000 0.609504E-05 7 128 4 3.141597270965576171875 0.469689E-05 3.141597986221313476563 0.455510E-05 8 256 4 3.141594171524047851563 0.609690E-05 3.141593933105468750000 0.543892E-05 9 512 4 3.141592979431152343750 0.899588E-05 3.141592979431152343750 0.723405E-05 10 1024 4 3.141591548919677734375 0.146788E-04 3.141592502593994140625 0.946899E-05 11 2048 4 3.141591787338256835938 0.261280E-04 3.141592264175415039063 0.173589E-04 12 4096 4 3.141593933105468750000 0.489790E-04 3.141592502593994140625 0.263050E-04 13 8192 4 3.141591310501098632813 0.947432E-04 3.141592264175415039063 0.575632E-04 14 16384 4 3.141590595245361328125 0.188762E-03 3.141592741012573242188 0.112181E-03 15 32768 4 3.141591072082519531250 0.378389E-03 3.141592979431152343750 0.220050E-03 16 65536 4 3.141590118408203125000 0.751247E-03 3.141593456268310546875 0.408755E-03 17 131072 4 3.141554117202758789063 0.154010E-02 3.141596794128417968750 0.760757E-03 18 262144 4 3.141556262969970703125 0.298491E-02 3.141582489013671875000 0.145467E-02 19 524288 4 3.141239643096923828125 0.605573E-02 3.141627788543701171875 0.312847E-02 20 1048576 4 3.140426158905029296875 0.119114E-01 3.141475200653076171875 0.625211E-02 21 2097152 4 3.139504432678222656250 0.240703E-01 3.140707969665527343750 0.120829E-01 22 4194304 4 3.125116586685180664063 0.479449E-01 3.144064188003540039063 0.243648E-01 23 8388608 4 2.991986751556396484375 0.959211E-01 3.154937744140625000000 0.488788E-01 24 16777216 4 4.000000000000000000000 0.192015E+00 3.151985883712768554688 0.976604E-01 25 33554432 4 2.000000000000000000000 0.383891E+00 3.189924955368041992188 0.195712E+00 26 67108864 4 1.000000000000000000000 0.810339E+00 3.209477424621582031250 0.385853E+00 27 134217728 4 0.500000000000000000000 0.168523E+01 2.000000000000000000000 0.780499E+00 28 268435456 4 0.250000000000000000000 0.344224E+01 1.000000000000000000000 0.154741E+01 29 536870912 4 0.125000000000000000000 0.694324E+01 0.500000000000000000000 0.307688E+01 30 1073741824 4 0.062500000000000000000 0.139509E+02 0.250000000000000000000 0.613776E+01 31 2147483648 4 0.031250000000000000000 0.279735E+02 0.125000000000000000000 0.122842E+02 32 4294967296 4 0.015625000000000000000 0.560250E+02 0.062500000000000000000 0.245997E+02 33 8589934592 4 0.007812500000000000000 0.112100E+03 0.031250000000000000000 0.497768E+02 34 17179869184 4 0.003906250000000000000 0.224344E+03 0.015625000000000000000 0.986845E+02 35 34359738368 4 0.001953125000000000000 0.448515E+03 0.007812500000000000000 0.198078E+03