x = 278, y = 135, rule = B3678/S34678 bbobo$b3o$4o$obobo$bobo$o$o$4o$o$$3o$oo$bbo206bo34b6oboo$o3bo143b3o15b o41boobo27boobbobb6obo$oboo143boboo15bo42boo17bo9bob14o$4o96bo34bobboo 5boboobbo10b4o35bobobob4obo15boo3boo4b14o$4o95b3o12bo6bo12b5o3bobb5o 10bobb5obo32b4obobobo6boob4obb10obb14obobboo9bo$41bo29bo27b3o17b3o8bo 3b8obob5obo4bo3b9o30bob6obb4obobobb5obob27o11boo8bo$11bo6bo9boo11boo5b oo8boo6boobboboo4b4o4boobboobobbobb6o9bo3booboo4bobobobb10ob5obo5bob 12o4bobo13bo5boob15obb42o4b3ob3o3boobo$8booboo7boobobobobbo9b6obobbobb oob3obo4bob6o3bobb4obbob18obboobb3ob3ob4obob51obo4boobo3bobobobobb60ob o3b13o$5boob3ob8obb13o3bob20obboobb18obb92obo3b11ob65ob15o$3boob6o3b 99ob63o4b94o$bb178ob96o$b275obo$bb178ob96o$3boob6o3b99ob63o4b94o$5boob 3ob8obb13o3bob20obboobb18obb92obo3b11ob65ob15o$8booboo7boobobobobbo9b 6obobbobboob3obo4bob6o3bobb4obbob18obboobb3ob3ob4obob51obo4boobo3bobob obobb60obo3b13o$11bo6bo9boo11boo5boo8boo6boobboboo4b4o4boobboobobbobb 6o9bo3booboo4bobobobb10ob5obo5bob12o4bobo13bo5boob15obb42o4b3ob3o3boob o$41bo29bo27b3o17b3o8bo3b8obob5obo4bo3b9o30bob6obb4obobobb5obob27o11b oo8bo$4o95b3o12bo6bo12b5o3bobb5o10bobb5obo32b4obobobo6boob4obb10obb14o bobboo9bo$4o96bo34bobboo5boboobbo10b4o35bobobob4obo15boo3boo4b14o$oboo 143boboo15bo42boo17bo9bob14o$o3bo143b3o15bo41boobo27boobbobb6obo$bbo 206bo34b6oboo$oo$3o$$o$4o$o$o$bobo$obobo$4o$b3o$bbobo11$36bo$31bo4boob oo$29bobob8o6booboo$28bobb9obo3b10o$27b14obb10obo$26b29o$26b27obbo$27b 5ob20ob3o$28b4o4bo3bo3bo3bo3boboo$29boo$30bo$29boo$28b4o4bo3bo3bo3bo3b oboo$27b5ob20ob3o$26b27obbo$26b29o$27b14obb10obo$28bobb9obo3b10o$29bob ob8o6booboo$31bo4booboo$36bo11$bbobo$b3o$4o$obobo$bobo$o$o$4o$o$$3o$oo $bbo206bo34b6oboo$o3bo143b3o15bo41boobo27boobbobb6obo$oboo143boboo15bo 42boo17bo9bob14o$4o96bo34bobboo5boboobbo10b4o35bobobob4obo15boo3boo4b 14o$4o95b3o12bo6bo12b5o3bobb5o10bobb5obo32b4obobobo6boob4obb10obb14obo bboo9bo$41bo29bo27b3o17b3o8bo3b8obob5obo4bo3b9o30bob6obb4obobobb5obob 27o11boo8bo$11bo6bo9boo11boo5boo8boo6boobboboo4b4o4boobboobobbobb6o9bo 3booboo4bobobobb10ob5obo5bob12o4bobo13bo5boob15obb42o4b3ob3o3boobo$8b ooboo7boobobobobbo9b6obobbobboob3obo4bob6o3bobb4obbob18obboobb3ob3ob4o bob51obo4boobo3bobobobobb60obo3b13o$5boob3ob8obb13o3bob20obboobb18obb 92obo3b11ob65ob15o$3boob6o3b99ob63o4b94o$bb178ob96o$b275obo$bb178ob96o $3boob6o3b99ob63o4b94o$5boob3ob8obb13o3bob20obboobb18obb92obo3b11ob65o b15o$8booboo7boobobobobbo9b6obobbobboob3obo4bob6o3bobb4obbob18obboobb 3ob3ob4obob51obo4boobo3bobobobobb60obo3b13o$11bo6bo9boo11boo5boo8boo6b oobboboo4b4o4boobboobobbobb6o9bo3booboo4bobobobb10ob5obo5bob12o4bobo 13bo5boob15obb42o4b3ob3o3boobo$41bo29bo27b3o17b3o8bo3b8obob5obo4bo3b9o 30bob6obb4obobobb5obob27o11boo8bo$4o95b3o12bo6bo12b5o3bobb5o10bobb5obo 32b4obobobo6boob4obb10obb14obobboo9bo$4o96bo34bobboo5boboobbo10b4o35bo bobob4obo15boo3boo4b14o$oboo143boboo15bo42boo17bo9bob14o$o3bo143b3o15b o41boobo27boobbobb6obo$bbo206bo34b6oboo$oo$3o$$o$4o$o$o$bobo$obobo$4o$ b3o$bbobo! This is a period 1800 puffer which is the second in an infinite series of puffers with arbitrarily larger periods. Moving the central puffer forwards by 120 cells increases the period by 720. You can move the central puffer backwards once by 120 cells to make the minimal period puffer in the series which has period 1080. But then the reaction is changed slightly due to different impacts with the blobs, so you have to run the puffer once through to get the correct central puffer shape. David I. Bell, April 1997