8932946679933596759506206130017828475418
918307145

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Feigenbaum reduction parameter

2.502907875095892822283902873218215786381271376727149977336192056

Feigenbaum bifurcation velocity constant

4.669201609102990671853203820466201617258185577475768632745651343
00413433021131473

References:
Briggs, Keith
A precise calculation of the Feigenbaum constants. (English)
Math. Comp. 57 (1991), no. 195, 435--439.

Briggs, Keith How to calculate the Feigenbaum constants on your PC.
Austral. Math. Soc. Gaz. 16 (1989), no. 4, 89--92.58F14

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Fransen-Robinson constant.

2.80777024202851936522150118655777293230808592093019829122005

ref :
Math of Computation, vol 34 1980 pp 553-566
Math of Computation vol 37 1981 pp 233-235

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170000 digits of gamma, as calculated from a value furnished by Jon Borwein.
gamma or Euler constant is Lim(n->infinity) {sum(1/k,k=1..n) - log(n)}

.57721566490153286060651209008240243104215933593992359880576723488486772677766
467093694706329174674951463144724980708248096050401448654283622417399764492353
625350033374293733773767394279259525824709491600873520394816567085323315177661
152862119950150798479374508570574002992135478614669402960432542151905877553526
733139925401296742051375413954911168510280798423487758720503843109399736137255
306088933126760017247953783675927135157722610273492913940798430103417771778088
154957066107501016191663340152278935867965497252036212879226555953669628176388
792726801324310104765059637039473949576389065729679296010090151251959509222435
014093498712282479497471956469763185066761290638110518241974448678363808617494
551698927923018773910729457815543160050021828440960537724342032854783670151773
943987003023703395183286900015581939880427074115422278197165230110735658339673
487176504919418123000406546931429992977795693031005030863034185698032310836916
400258929708909854868257773642882539549258736295961332985747393023734388470703
702844129201664178502487333790805627549984345907616431671031467107223700218107
450444186647591348036690255324586254422253451813879124345735013612977822782881
489459098638460062931694718871495875254923664935204732436410972682761608775950
8809512620840454447799229915724829251625127842765965708321461029821461795195