List of recent champions for factoring Cunningham numbers:

Special number field sieve by size of number factored:
4949	c248	2,1642M	Aoki+Kida+Shimoyama+Sonoda+Ueda/CRYPTREC
4757	C244	2,809-	Franke/Kleinjung/Bahr/CWI

Special number field sieve by SNFS difficulty:
4949	c248	2,1642M	Aoki+Kida+Shimoyama+Sonoda+Ueda/CRYPTREC
4983	c239	2,811-	NFSNET"

General number field sieve by size of number factored:
5158	C176	11,281+ Aoki+Kida+Shimoyama+Ueda
4924	C164	2,1826L Aoki+Kida+Shimoyama+Sonoda+Ueda/CRYPTREC

Elliptic curve method:
5135	P66	3,466+	B. Dodson ECMNET
5139	P62	2,2034L	B. Dodson ECMNET

Largest penultimate prime factor (ultimate factor shown also):
4835	p105*p107 10,223-   Dodson/AKL/Leyland/CWI
5101	p102*p106 12,597M   CWI

	First five holes in each table on June 24, 2005

2,739-	c168	2,761-	c189	2,781-	c158	2,787-	c204	2,793-	c186
2,719+	c166	2,749+	c189	2,751+	c166	2,779+	c212	2,791+	c192
2,1322M	c175	2,1334L	c186	2,1342M	c138	2,1346L	c183	2,1366L	c193
2,736+	c172	2,760+	c153	2,764+	c220	2,772+	c215	2,776+	c180

3,443-	c187	3,449-	c175	3,461-	c157	3,487-	c222	3,493-	c197
3,452+	c195	3,463+	c200	3,479+	c197	3,497+	c191	3,499+	c238

5,311-	c173	5,313-	c210	5,317-	c194	5,319-	c182	5,323-	c186
5,311+	c159	5,313+	c197	5,314+	c179	5,331+	c193	5,346+	c174

6,263-	c196	6,281-	c162	6,283-	c173	6,299-	c155	6,305-	c155
6,271+	c195	6,274+	c191	6,283+	c193	6,284+	c168	6,287+	c154

7,257-	c192	7,259-	c175	7,263-	c161	7,269-	c224	7,271-	c214
7,257+	c189	7,268+	c185	7,277+	c165	7,281+	c193	7,284+	c201

10,239-	c228	10,241-	c229	10,257-	c241	10,263-	c216	10,269-	c233
10,226+	c197	10,229+	c164	10,232+	c160	10,236+	c193	10,238+	c152

11,227-	c195	11,229-	c217	11,233-	c181	11,235-	c182	11,239-	c246
11,218+	c147	11,220+	c147	11,224+	c194	11,226+	c222	11,233+	c200

12,227-	c197	12,229-	c242	12,233-	c215	12,239-	c255	12,241-	c260
12,227+	c213	12,229+	c158	12,232+	c181	12,236+	c151	12,242+	c209