Prime p₀= 1208552823899082383 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 18 26 6 66 10 2 28 20 22 8 22 20 28 2 10 66 6 26 18 (?)
a_n: 0 18 44 50 116 126 128 156 176 198 206 228 248 276 278 288 354 360 386 404
All 20 integers p_n = p₀+a_n = p_n-1+d_n are prime and there are no other primes in the gaps.
diameter: 404
derived by truncating larger tuple
Found by: [AF>Libristes] Elorak
db: batch=77, k=20, 18 26 6 66 10 2 28 20 22 8

STPT(10)	1208551068027722369	0 2 18 20 30 32 42 44 60 62	-1755871360014
SPT(18)	1208551204323407453	0 6 14 18 66 78 134 188 216 218 246 300 356 368 416 420 428 434	-1619575674930
SPT(16)	1208551873808029183	0 6 16 34 54 58 76 96 118 138 156 160 180 198 208 214	-950091053200
SPT(16)	1208552118025063313	0 50 54 56 74 80 108 116 168 176 204 210 228 230 234 284	-705874019070
SPT(16)	1208552283297213131	0 32 50 60 96 146 182 186 212 216 252 302 338 348 366 398	-540601869252
SPT(24)	1208552823899082353	0 6 30 48 74 80 146 156 158 186 206 228 236 258 278 306 308 318 384 390 416 434 458 464	-30
STPT(10)	1208553012833410859	0 2 18 20 30 32 42 44 60 62	188934328476
SPT(16)	1208553046705073383	0 6 30 40 58 90 118 138 196 216 244 276 294 304 328 334	222805991000
STPT(10)	1208553145769869967	0 2 12 14 72 74 132 134 144 146	321870787584
STPT(10)	1208553161210604017	0 2 12 14 42 44 72 74 84 86	337311521634
STPT(10)	1208553284170062527	0 2 12 14 72 74 132 134 144 146	460270980144
STPT(12)	1208553656411667749	0 2 30 32 42 44 240 242 252 254 282 284	832512585366