Prime p₀= 378736148207248751 starts a Symmetric tuple of 20 consecutive primes (SPT).
d_n: 0 2 54 34 50 10 6 20 12 18 16 18 12 20 6 10 50 34 54 2 (?)
a_n: 0 2 56 90 140 150 156 176 188 206 222 240 252 272 278 288 338 372 426 428
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: 428
derived by truncating larger tuple
Found by: Cruncher Pete
db: batch=70, k=20, 2 54 34 50 10 6 20 12 18 16

SPT(14)	378736089147038561	0 56 68 92 102 108 116 162 170 176 186 210 222 278	-59060210190
TPT(12)	378736098484207571	0 2 18 20 126 128 156 158 186 188 258 260	-49723041180
TPT(12)	378736099426139471	0 2 18 20 78 80 126 128 186 188 210 212	-48781109280
SPT(14)	378736125367451123	0 18 48 56 98 108 140 174 206 216 258 266 296 314	-22839797628
SPT(14)	378736132797001703	0 6 44 78 96 98 110 114 126 128 146 180 218 224	-15410247048
SPT(22)	378736148207248739	0 12 14 68 102 152 162 168 188 200 218 234 252 264 284 290 300 350 384 438 440 452	-12
SPT(14)	378736157453494277	0 24 50 56 66 110 120 140 150 194 204 210 236 260	9246245526
TPT(12)	378736195868897567	0 2 24 26 30 32 72 74 114 116 192 194	47661648816
SPT(14)	378736199548907887	0 10 42 66 136 150 154 162 166 180 250 274 306 316	51341659136
SPT(14)	378736227718180649	0 20 98 104 114 120 140 162 182 188 198 204 282 302	79510931898
TPT(12)	378736234052050757	0 2 84 86 120 122 192 194 210 212 264 266	85844802006
SPT(14)	378736249752519667	0 54 60 64 84 106 130 270 294 316 336 340 346 400	101545270916